Reorganize for great victory and move to blob for payload hasg

tests/test_message_pagination.py

@@ -2,28 +2,8 @@
 
 import pytest
 
-from app.database import Database
 from app.repository import MessageRepository
 
-
-@pytest.fixture
-async def test_db():
-    """Create an in-memory test database."""
-    import app.repository as repo_module
-
-    db = Database(":memory:")
-    await db.connect()
-
-    original_db = repo_module.db
-    repo_module.db = db
-
-    try:
-        yield db
-    finally:
-        repo_module.db = original_db
-        await db.disconnect()
-
-
 CHAN_KEY = "ABC123DEF456ABC123DEF456ABC12345"
 DM_KEY = "aa" * 32