Implement Phase 1: Foundation for MeshCore Hub

This commit establishes the complete foundation for the MeshCore Hub project:

- Project setup with pyproject.toml (Python 3.11+, all dependencies)
- Development tools: black, flake8, mypy, pytest configuration
- Pre-commit hooks for code quality
- Package structure with all components (interface, collector, api, web)

Common package includes:
- Pydantic settings for all component configurations
- SQLAlchemy models for nodes, messages, advertisements, traces, telemetry
- Pydantic schemas for events, API requests/responses, commands
- MQTT client utilities with topic builder
- Logging configuration

Database infrastructure:
- Alembic setup with initial migration for all tables
- Database manager with session handling

CLI entry point:
- Click-based CLI with subcommands for all components
- Database migration commands (upgrade, downgrade, revision)

Tests:
- Basic test suite for config and models
- pytest fixtures for in-memory database testing

alembic/env.py

@@ -0,0 +1,85 @@
+"""Alembic environment configuration."""
+
+import os
+from logging.config import fileConfig
+
+from alembic import context
+from sqlalchemy import engine_from_config, pool
+
+from meshcore_hub.common.models import Base
+
+# this is the Alembic Config object
+config = context.config
+
+# Interpret the config file for Python logging.
+if config.config_file_name is not None:
+    fileConfig(config.config_file_name)
+
+# Model's MetaData object for 'autogenerate' support
+target_metadata = Base.metadata
+
+
+def get_database_url() -> str:
+    """Get database URL from environment or config."""
+    # First try environment variable
+    url = os.environ.get("DATABASE_URL")
+    if url:
+        return url
+    # Fall back to alembic.ini
+    return config.get_main_option("sqlalchemy.url", "sqlite:///./meshcore.db")
+
+
+def run_migrations_offline() -> None:
+    """Run migrations in 'offline' mode.
+
+    This configures the context with just a URL
+    and not an Engine, though an Engine is acceptable
+    here as well. By skipping the Engine creation
+    we don't even need a DBAPI to be available.
+
+    Calls to context.execute() here emit the given string to the
+    script output.
+    """
+    url = get_database_url()
+    context.configure(
+        url=url,
+        target_metadata=target_metadata,
+        literal_binds=True,
+        dialect_opts={"paramstyle": "named"},
+        render_as_batch=True,  # SQLite batch mode for ALTER TABLE
+    )
+
+    with context.begin_transaction():
+        context.run_migrations()
+
+
+def run_migrations_online() -> None:
+    """Run migrations in 'online' mode.
+
+    In this scenario we need to create an Engine
+    and associate a connection with the context.
+    """
+    configuration = config.get_section(config.config_ini_section, {})
+    configuration["sqlalchemy.url"] = get_database_url()
+
+    connectable = engine_from_config(
+        configuration,
+        prefix="sqlalchemy.",
+        poolclass=pool.NullPool,
+    )
+
+    with connectable.connect() as connection:
+        context.configure(
+            connection=connection,
+            target_metadata=target_metadata,
+            render_as_batch=True,  # SQLite batch mode for ALTER TABLE
+        )
+
+        with context.begin_transaction():
+            context.run_migrations()
+
+
+if context.is_offline_mode():
+    run_migrations_offline()
+else:
+    run_migrations_online()

alembic/script.py.mako

@@ -0,0 +1,26 @@
+"""${message}
+
+Revision ID: ${up_revision}
+Revises: ${down_revision | comma,n}
+Create Date: ${create_date}
+
+"""
+from typing import Sequence, Union
+
+from alembic import op
+import sqlalchemy as sa
+${imports if imports else ""}
+
+# revision identifiers, used by Alembic.
+revision: str = ${repr(up_revision)}
+down_revision: Union[str, None] = ${repr(down_revision)}
+branch_labels: Union[str, Sequence[str], None] = ${repr(branch_labels)}
+depends_on: Union[str, Sequence[str], None] = ${repr(depends_on)}
+
+
+def upgrade() -> None:
+    ${upgrades if upgrades else "pass"}
+
+
+def downgrade() -> None:
+    ${downgrades if downgrades else "pass"}

alembic/versions/20241202_0001_001_initial_schema.py

@@ -0,0 +1,244 @@
+"""Initial database schema
+
+Revision ID: 001
+Revises:
+Create Date: 2024-12-02
+
+"""
+from typing import Sequence, Union
+
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision: str = "001"
+down_revision: Union[str, None] = None
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+
+def upgrade() -> None:
+    # Create nodes table
+    op.create_table(
+        "nodes",
+        sa.Column("id", sa.String(), nullable=False),
+        sa.Column("public_key", sa.String(64), nullable=False),
+        sa.Column("name", sa.String(255), nullable=True),
+        sa.Column("adv_type", sa.String(20), nullable=True),
+        sa.Column("flags", sa.Integer(), nullable=True),
+        sa.Column("first_seen", sa.DateTime(timezone=True), nullable=False),
+        sa.Column("last_seen", sa.DateTime(timezone=True), nullable=False),
+        sa.Column(
+            "created_at",
+            sa.DateTime(timezone=True),
+            server_default=sa.func.now(),
+            nullable=False,
+        ),
+        sa.Column(
+            "updated_at",
+            sa.DateTime(timezone=True),
+            server_default=sa.func.now(),
+            nullable=False,
+        ),
+        sa.PrimaryKeyConstraint("id"),
+        sa.UniqueConstraint("public_key"),
+    )
+    op.create_index("ix_nodes_public_key", "nodes", ["public_key"])
+    op.create_index("ix_nodes_last_seen", "nodes", ["last_seen"])
+    op.create_index("ix_nodes_adv_type", "nodes", ["adv_type"])
+
+    # Create node_tags table
+    op.create_table(
+        "node_tags",
+        sa.Column("id", sa.String(), nullable=False),
+        sa.Column("node_id", sa.String(), nullable=False),
+        sa.Column("key", sa.String(100), nullable=False),
+        sa.Column("value", sa.Text(), nullable=True),
+        sa.Column("value_type", sa.String(20), nullable=False, server_default="string"),
+        sa.Column(
+            "created_at",
+            sa.DateTime(timezone=True),
+            server_default=sa.func.now(),
+            nullable=False,
+        ),
+        sa.Column(
+            "updated_at",
+            sa.DateTime(timezone=True),
+            server_default=sa.func.now(),
+            nullable=False,
+        ),
+        sa.ForeignKeyConstraint(["node_id"], ["nodes.id"], ondelete="CASCADE"),
+        sa.PrimaryKeyConstraint("id"),
+        sa.UniqueConstraint("node_id", "key", name="uq_node_tags_node_key"),
+    )
+    op.create_index("ix_node_tags_node_id", "node_tags", ["node_id"])
+    op.create_index("ix_node_tags_key", "node_tags", ["key"])
+
+    # Create messages table
+    op.create_table(
+        "messages",
+        sa.Column("id", sa.String(), nullable=False),
+        sa.Column("receiver_node_id", sa.String(), nullable=True),
+        sa.Column("message_type", sa.String(20), nullable=False),
+        sa.Column("pubkey_prefix", sa.String(12), nullable=True),
+        sa.Column("channel_idx", sa.Integer(), nullable=True),
+        sa.Column("text", sa.Text(), nullable=False),
+        sa.Column("path_len", sa.Integer(), nullable=True),
+        sa.Column("txt_type", sa.Integer(), nullable=True),
+        sa.Column("signature", sa.String(8), nullable=True),
+        sa.Column("snr", sa.Float(), nullable=True),
+        sa.Column("sender_timestamp", sa.DateTime(timezone=True), nullable=True),
+        sa.Column("received_at", sa.DateTime(timezone=True), nullable=False),
+        sa.Column(
+            "created_at",
+            sa.DateTime(timezone=True),
+            server_default=sa.func.now(),
+            nullable=False,
+        ),
+        sa.Column(
+            "updated_at",
+            sa.DateTime(timezone=True),
+            server_default=sa.func.now(),
+            nullable=False,
+        ),
+        sa.ForeignKeyConstraint(["receiver_node_id"], ["nodes.id"], ondelete="SET NULL"),
+        sa.PrimaryKeyConstraint("id"),
+    )
+    op.create_index("ix_messages_receiver_node_id", "messages", ["receiver_node_id"])
+    op.create_index("ix_messages_message_type", "messages", ["message_type"])
+    op.create_index("ix_messages_pubkey_prefix", "messages", ["pubkey_prefix"])
+    op.create_index("ix_messages_channel_idx", "messages", ["channel_idx"])
+    op.create_index("ix_messages_received_at", "messages", ["received_at"])
+
+    # Create advertisements table
+    op.create_table(
+        "advertisements",
+        sa.Column("id", sa.String(), nullable=False),
+        sa.Column("receiver_node_id", sa.String(), nullable=True),
+        sa.Column("node_id", sa.String(), nullable=True),
+        sa.Column("public_key", sa.String(64), nullable=False),
+        sa.Column("name", sa.String(255), nullable=True),
+        sa.Column("adv_type", sa.String(20), nullable=True),
+        sa.Column("flags", sa.Integer(), nullable=True),
+        sa.Column("received_at", sa.DateTime(timezone=True), nullable=False),
+        sa.Column(
+            "created_at",
+            sa.DateTime(timezone=True),
+            server_default=sa.func.now(),
+            nullable=False,
+        ),
+        sa.Column(
+            "updated_at",
+            sa.DateTime(timezone=True),
+            server_default=sa.func.now(),
+            nullable=False,
+        ),
+        sa.ForeignKeyConstraint(["receiver_node_id"], ["nodes.id"], ondelete="SET NULL"),
+        sa.ForeignKeyConstraint(["node_id"], ["nodes.id"], ondelete="SET NULL"),
+        sa.PrimaryKeyConstraint("id"),
+    )
+    op.create_index("ix_advertisements_receiver_node_id", "advertisements", ["receiver_node_id"])
+    op.create_index("ix_advertisements_node_id", "advertisements", ["node_id"])
+    op.create_index("ix_advertisements_public_key", "advertisements", ["public_key"])
+    op.create_index("ix_advertisements_received_at", "advertisements", ["received_at"])
+
+    # Create trace_paths table
+    op.create_table(
+        "trace_paths",
+        sa.Column("id", sa.String(), nullable=False),
+        sa.Column("receiver_node_id", sa.String(), nullable=True),
+        sa.Column("initiator_tag", sa.BigInteger(), nullable=False),
+        sa.Column("path_len", sa.Integer(), nullable=True),
+        sa.Column("flags", sa.Integer(), nullable=True),
+        sa.Column("auth", sa.Integer(), nullable=True),
+        sa.Column("path_hashes", sa.JSON(), nullable=True),
+        sa.Column("snr_values", sa.JSON(), nullable=True),
+        sa.Column("hop_count", sa.Integer(), nullable=True),
+        sa.Column("received_at", sa.DateTime(timezone=True), nullable=False),
+        sa.Column(
+            "created_at",
+            sa.DateTime(timezone=True),
+            server_default=sa.func.now(),
+            nullable=False,
+        ),
+        sa.Column(
+            "updated_at",
+            sa.DateTime(timezone=True),
+            server_default=sa.func.now(),
+            nullable=False,
+        ),
+        sa.ForeignKeyConstraint(["receiver_node_id"], ["nodes.id"], ondelete="SET NULL"),
+        sa.PrimaryKeyConstraint("id"),
+    )
+    op.create_index("ix_trace_paths_receiver_node_id", "trace_paths", ["receiver_node_id"])
+    op.create_index("ix_trace_paths_initiator_tag", "trace_paths", ["initiator_tag"])
+    op.create_index("ix_trace_paths_received_at", "trace_paths", ["received_at"])
+
+    # Create telemetry table
+    op.create_table(
+        "telemetry",
+        sa.Column("id", sa.String(), nullable=False),
+        sa.Column("receiver_node_id", sa.String(), nullable=True),
+        sa.Column("node_id", sa.String(), nullable=True),
+        sa.Column("node_public_key", sa.String(64), nullable=False),
+        sa.Column("lpp_data", sa.LargeBinary(), nullable=True),
+        sa.Column("parsed_data", sa.JSON(), nullable=True),
+        sa.Column("received_at", sa.DateTime(timezone=True), nullable=False),
+        sa.Column(
+            "created_at",
+            sa.DateTime(timezone=True),
+            server_default=sa.func.now(),
+            nullable=False,
+        ),
+        sa.Column(
+            "updated_at",
+            sa.DateTime(timezone=True),
+            server_default=sa.func.now(),
+            nullable=False,
+        ),
+        sa.ForeignKeyConstraint(["receiver_node_id"], ["nodes.id"], ondelete="SET NULL"),
+        sa.ForeignKeyConstraint(["node_id"], ["nodes.id"], ondelete="SET NULL"),
+        sa.PrimaryKeyConstraint("id"),
+    )
+    op.create_index("ix_telemetry_receiver_node_id", "telemetry", ["receiver_node_id"])
+    op.create_index("ix_telemetry_node_id", "telemetry", ["node_id"])
+    op.create_index("ix_telemetry_node_public_key", "telemetry", ["node_public_key"])
+    op.create_index("ix_telemetry_received_at", "telemetry", ["received_at"])
+
+    # Create events_log table
+    op.create_table(
+        "events_log",
+        sa.Column("id", sa.String(), nullable=False),
+        sa.Column("receiver_node_id", sa.String(), nullable=True),
+        sa.Column("event_type", sa.String(50), nullable=False),
+        sa.Column("payload", sa.JSON(), nullable=True),
+        sa.Column("received_at", sa.DateTime(timezone=True), nullable=False),
+        sa.Column(
+            "created_at",
+            sa.DateTime(timezone=True),
+            server_default=sa.func.now(),
+            nullable=False,
+        ),
+        sa.Column(
+            "updated_at",
+            sa.DateTime(timezone=True),
+            server_default=sa.func.now(),
+            nullable=False,
+        ),
+        sa.ForeignKeyConstraint(["receiver_node_id"], ["nodes.id"], ondelete="SET NULL"),
+        sa.PrimaryKeyConstraint("id"),
+    )
+    op.create_index("ix_events_log_receiver_node_id", "events_log", ["receiver_node_id"])
+    op.create_index("ix_events_log_event_type", "events_log", ["event_type"])
+    op.create_index("ix_events_log_received_at", "events_log", ["received_at"])
+
+
+def downgrade() -> None:
+    op.drop_table("events_log")
+    op.drop_table("telemetry")
+    op.drop_table("trace_paths")
+    op.drop_table("advertisements")
+    op.drop_table("messages")
+    op.drop_table("node_tags")
+    op.drop_table("nodes")