Pin sqlalchemy<2.1 to fix psycopg driver break; use tmp_path in retrain
- sqlalchemy 2.1 defaults postgresql:// URLs to psycopg (v3), but sientia_do
only ships psycopg2-binary, breaking with "No module named psycopg"
- Replace hardcoded 'tmp' mkdtemp mock with pytest tmp_path fixture in
retrain_model tests to avoid writing to a fake path
vitor-aignosi
9fb81ef556