Remove migration code and alembic dependency

src/server/database/README.md

@@ -13,7 +13,7 @@ This package provides persistent storage for anime series, episodes, download qu
 Install required dependencies:
 
 ```bash
-pip install sqlalchemy alembic aiosqlite
+pip install sqlalchemy aiosqlite
 ```
 
 Or use the project requirements:
@@ -163,24 +163,6 @@ from src.config.settings import settings
 settings.database_url = "sqlite:///./data/aniworld.db"
 ```
 
-## Migrations (Future)
-
-Alembic is installed for database migrations:
-
-```bash
-# Initialize Alembic
-alembic init alembic
-
-# Generate migration
-alembic revision --autogenerate -m "Description"
-
-# Apply migrations
-alembic upgrade head
-
-# Rollback
-alembic downgrade -1
-```
-
 ## Testing
 
 Run database tests:
@@ -196,7 +178,6 @@ The test suite uses an in-memory SQLite database for isolation and speed.
 -   **base.py**: Base declarative class and mixins
 -   **models.py**: SQLAlchemy ORM models (4 models)
 -   **connection.py**: Engine, session factory, dependency injection
--   **migrations.py**: Alembic migration placeholder
 -   ****init**.py**: Package exports
 -   **service.py**: Service layer with CRUD operations
 
@@ -432,5 +413,4 @@ Solution: Ensure referenced records exist before creating relationships.
 ## Further Reading
 
 -   [SQLAlchemy 2.0 Documentation](https://docs.sqlalchemy.org/en/20/)
--   [Alembic Tutorial](https://alembic.sqlalchemy.org/en/latest/tutorial.html)
 -   [FastAPI with Databases](https://fastapi.tiangolo.com/tutorial/sql-databases/)

src/server/database/init.py

@@ -313,7 +313,6 @@ async def get_schema_version(engine: Optional[AsyncEngine] = None) -> str:
     """Get current database schema version.
     
     Returns version string based on existing tables and structure.
-    For production, consider using Alembic versioning.
     
     Args:
         engine: Optional database engine (uses default if not provided)