[kcrmin]

What and why

SQLAlchemy 2.1.0 falls inside the declared >=2.0,<3.0 range. It types Result with variadic generics, so the pinned mypy 2.3.0 now reports var-annotated on three bare scalar_one() assignments. This annotates them as int, bool and str, each checked against the schema. There is no runtime change.

Replaces #100, which is closed.

Verified

All runs on CPython 3.12.13:

• mypy is clean on SQLAlchemy 2.1.6 and on 2.0.55.
• ruff check and format pass.
• gate8 on SQLAlchemy 2.1.6: 241 passed, 0 skipped.

Checklist

• Tests pass
• Type check passes on both SQLAlchemy lines
• No secrets or personal data