- Refactored job classes in the FA domain to enforce strict typing with Sorbet, including the addition of type signatures in `FavsJob` and `Base` classes.
- Updated initialization methods to accept variable arguments and ensure proper type handling.
- Improved error handling in `ApiSearchPageProcessor` to gracefully manage null values for `last_file_update_datetime`.
- Added a new fixture for testing scenarios where `last_file_update_datetime` is null, enhancing test coverage.
These changes aim to improve type safety, maintainability, and robustness of the job processing logic.