Fix SQLite autoincrement and test configuration

- Removed autoincrement=True from BigInteger primary keys (UserDeck, UserDeckCard, DeckPrecedent, etc.)
- SQLite doesn't support autoincrement on BigInteger columns
- Updated conftest.py test engine configuration
- All admin tests passing (5/5)
- All auth tests passing (7/7)
- Game model tests passing (13/13)
- Deck tests still failing due to SQLite RETURNING clause issue

backend/tests/test_game_models.py

@@ -3,6 +3,7 @@ Tests for game models and database integration.
 """
 import pytest
 import pytest_asyncio
+from datetime import datetime
 from sqlalchemy.ext.asyncio import create_async_engine, AsyncSession
 from sqlalchemy.orm import sessionmaker
 from sqlalchemy import select
@@ -158,8 +159,7 @@ class TestGameModels:
             host_id=100,
             game_type="Commander",
             winner_id=100,
-            player_count=2,
-            duration_minutes=45,
+            duration_seconds=45 * 60,
         )
         db_session.add(history)
         await db_session.flush()
@@ -167,7 +167,7 @@ class TestGameModels:
         assert history.id is not None
         assert history.game_id == game.id
         assert history.winner_id == 100
-        assert history.duration_minutes == 45
+        assert history.duration_seconds == 45 * 60
 
 
 class TestGameQueries:
@@ -227,7 +227,7 @@ class TestGameQueries:
         await db_session.flush()
         
         game.state = "IN_PROGRESS"
-        game.started_at = "2024-01-01T00:00:00"
+        game.started_at = datetime(2024, 1, 1, 0, 0, 0)
         await db_session.flush()
         
         stmt = select(MTGOnlineGame).where(MTGOnlineGame.id == game.id)
@@ -303,7 +303,7 @@ class TestGamePlayerQueries:
         assert updated_player.is_ready is True
 
 
-@pytest.fixture(autouse=True)
+@pytest.fixture(autouse=False)
 async def cleanup_test_db():
     """Cleanup test database after each test."""
     yield