Implement true PATCH behavior so omitted fields stay unchanged, while null can explicitly clear nullable nested data. Align patient update tests and OpenAPI schemas/responses with the new 200/400/404 contract.
Rename legacy boolean helpers to is* naming across test definitions, patient models, and infrastructure data to match rest of backend.
Update controllers, models, migrations, seeders, tests, and OpenAPI docs/bundled spec so contracts and runtime align.
Normalize formatting/line endings across configs, controllers, models, tests, and OpenAPI specs.
Update rule expression/rule engine implementation and remove obsolete RuleAction controller/model.
Add unit tests for rule expression syntax and multi-action behavior, and include docs updates.
