The alertoperator Postgres enum (migration 0002) was created with the operator
VALUES as labels ('>', '<', …), but the model's Enum(AlertOperator) defaulted to
persisting enum-member NAMES ('gt', 'lt', …) — so inserting any AlertRule against
real Postgres raised 'invalid input value for enum alertoperator: "gt"'. Never
caught because unit tests mock the DB and no integration test inserted a rule
until task 250's. Add values_callable so the ORM round-trips the values.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
bvandeusen
43a5325e69