Kunthawat Greethong fb9275818e fix: normalize bare postgres:// to postgresql+psycopg:// (worker crash-loop) ...

Root cause (confirmed on local): even with psycopg installed, SQLAlchemy
raises:
  NoSuchModuleError: Can't load plugin: sqlalchemy.dialects:postgres
when DATABASE_URL uses the bare 'postgres://' scheme, because SQLAlchemy
only resolves 'postgresql+driver://'. The deploy's DATABASE_URL was
'postgres://...', so alembic upgrade head (run by the entrypoint before
starting services) crashed and the worker crash-looped in supervisor.

Fix:
- create_database_engine now normalizes 'postgres://' and legacy
  'postgres+pq://' to 'postgresql+psycopg://' so a bare postgres scheme
  works as long as psycopg is installed.
- Dockerfile build step now verifies psycopg imports after 'uv sync'
  (fails the build loudly instead of a runtime crash-loop).
- Tests: 4 for URL normalization; backend suite now 201 passed.

2026-08-31 20:13:16 +07:00

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