feat: backend core — models, auth, CRUD, tests

backend/alembic/env.py

@@ -6,6 +6,7 @@ from alembic import context
 from sqlalchemy import pool
 from sqlalchemy.ext.asyncio import create_async_engine
 
+import app.models  # noqa: F401 — register all models with Base.metadata
 from app.database import Base
 
 config = context.config