[ZacKienzle2]

Fixes #153.

On Python 3.14, inspect.signature evaluates deferred annotations (PEP 649, PEP 749) in annotationlib.Format.VALUE. A callable whose annotation names a type imported only under TYPE_CHECKING then raises NameError. The standard library's _colorize does this with IO, so a run whose module imports anything that reaches traceback stopped in TypeSystem.infer_signature without writing tests.

infer_signature now passes annotation_format=annotationlib.Format.FORWARDREF on 3.14 and later. The unresolvable name stays a ForwardRef, the parameters keep their names and kinds, and the type hint provider treats the annotation as unknown, as type_hints_provider already does when typing.get_type_hints raises NameError. Earlier versions are unchanged: there inspect.signature does not evaluate annotations.

Tests

test_infer_type_info_annotation_imported_for_type_checking (skipped before 3.14) infers the signature of a fixture function annotated with a TYPE_CHECKING-only import and checks that it keeps its parameter, typed Any.

On Python 3.14 with poetry install --with dev,test: the pre-commit hooks pass (ruff, ruff-format, reuse lint and the rest), poetry run mypy reports no issues in 229 source files, and the new test passes. tests/analyses/test_typesystem.py has 2 to 3 failures in test_find_by_symbols with or without this change; on unchanged main the same file gave 6, so those are independent of it.