Converts 115 `# type: ignore[...]` suppressions across 23 test files to
no-suppression patterns (helper-return widening to Any, local Any aliases,
cc:Any aliases, cast at narrow call sites, typed fixtures) so the hard
no-type:ignore convention holds across tests/. No test logic or assertions
changed — only mock-wiring mechanics and type annotations.
Gate: ruff check tests/ clean; mypy tests/ (538 files) clean; 176 changed-file
tests pass. Zero real suppressions remain (the 7 grep hits are 3 hygiene-
checker string-literal test inputs and 4 prose mentions in comments).
Two task creates for the same project/HEAD can race to populate the
conventions cache; the loser's INSERT fails the partial-unique index with
IntegrityError. A bare session.add + flush poisons the shared session (the
task-create transaction rides the same session), so every subsequent op
raises 'this session is in error state' and task creation crashes.
Run the INSERT in a savepoint (begin_nested) and swallow the IntegrityError:
only the savepoint rolls back, the outer transaction stays usable, and the
winner's row satisfies the next _cache_get.
Renn F