This commit addresses two issues:
1. A `TypeError` during Alembic migrations (`upgrade() takes 0 positional
arguments but 1 was given`). This was caused by the `upgrade` and
`downgrade` functions in the initial migration script not accepting
any arguments, while the custom migration runner in `migrations.py`
was passing a context argument.
- Modified `be/alembic/versions/0001_initial_schema.py` to ensure
`upgrade` and `downgrade` functions accept a `context` argument.
2. Redundant execution of migrations. Migrations were being triggered
both by the `entrypoint.sh` script and within the FastAPI application's
startup event in `app/main.py`.
- Commented out the `await run_migrations()` call in `app/main.py`
to ensure migrations are only handled by the `entrypoint.sh` script.
These changes should ensure that database migrations run correctly and only
once when the backend container starts.
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