Add Ruff formatting and pre-commit hooks

Configure Ruff as the code formatter and linter with pre-commit hooks.
  Applied automatic formatting fixes across the entire codebase including:
  - Import sorting and organization
  - Code style consistency (spacing, line breaks, indentation)
  - String quote normalization
  - Removal of trailing whitespace and unnecessary blank lines

startdb.py

@@ -1,12 +1,11 @@
 import asyncio
-import json
 import datetime
+import json
 import logging
+
 from sqlalchemy import delete
-from meshview import mqtt_reader
-from meshview import mqtt_database
-from meshview import mqtt_store
-from meshview import models
+
+from meshview import models, mqtt_database, mqtt_reader, mqtt_store
 from meshview.config import CONFIG
 
 # -------------------------
@@ -20,31 +19,32 @@ formatter = logging.Formatter('%(asctime)s [%(levelname)s] %(message)s')
 file_handler.setFormatter(formatter)
 cleanup_logger.addHandler(file_handler)
 
+
 # -------------------------
 # Helper functions
 # -------------------------
 def get_bool(config, section, key, default=False):
     return str(config.get(section, {}).get(key, default)).lower() in ("1", "true", "yes", "on")
 
+
 def get_int(config, section, key, default=0):
     try:
         return int(config.get(section, {}).get(key, default))
     except ValueError:
         return default
 
+
 # -------------------------
 # Shared DB lock
 # -------------------------
 db_lock = asyncio.Lock()
 
+
 # -------------------------
 # Database cleanup using ORM
 # -------------------------
 async def daily_cleanup_at(
-    hour: int = 2,
-    minute: int = 0,
-    days_to_keep: int = 14,
-    vacuum_db: bool = True
+    hour: int = 2, minute: int = 0, days_to_keep: int = 14, vacuum_db: bool = True
 ):
     while True:
         now = datetime.datetime.now()
@@ -56,7 +56,9 @@ async def daily_cleanup_at(
         await asyncio.sleep(delay)
 
         # Local-time cutoff as string for SQLite DATETIME comparison
-        cutoff = (datetime.datetime.now() - datetime.timedelta(days=days_to_keep)).strftime("%Y-%m-%d %H:%M:%S")
+        cutoff = (datetime.datetime.now() - datetime.timedelta(days=days_to_keep)).strftime(
+            "%Y-%m-%d %H:%M:%S"
+        )
         cleanup_logger.info(f"Running cleanup for records older than {cutoff}...")
 
         try:
@@ -110,6 +112,7 @@ async def daily_cleanup_at(
         except Exception as e:
             cleanup_logger.error(f"Error during cleanup: {e}")
 
+
 # -------------------------
 # MQTT loading
 # -------------------------
@@ -118,7 +121,7 @@ async def load_database_from_mqtt(
     mqtt_port: int,
     topics: list,
     mqtt_user: str | None = None,
-    mqtt_passwd: str | None = None
+    mqtt_passwd: str | None = None,
 ):
     async for topic, env in mqtt_reader.get_topic_envelopes(
         mqtt_server, mqtt_port, topics, mqtt_user, mqtt_passwd
@@ -126,6 +129,7 @@ async def load_database_from_mqtt(
         async with db_lock:  # Block if cleanup is running
             await mqtt_store.process_envelope(topic, env)
 
+
 # -------------------------
 # Main function
 # -------------------------
@@ -156,12 +160,11 @@ async def main():
         )
 
         if cleanup_enabled:
-            tg.create_task(
-                daily_cleanup_at(cleanup_hour, cleanup_minute, cleanup_days, vacuum_db)
-            )
+            tg.create_task(daily_cleanup_at(cleanup_hour, cleanup_minute, cleanup_days, vacuum_db))
         else:
             cleanup_logger.info("Daily cleanup is disabled by configuration.")
 
+
 # -------------------------
 # Entry point
 # -------------------------