v0.0.5

fix: robust API error handling and enhanced debugging context

- Introduced PinnerError::RateLimit for explicit identification of global fatal errors.
- Implemented is_fatal() to distinguish between abortive (rate limits, IO) and skippable (404 Not Found) errors.
- Updated execution logic to issue a warning and continue on non-fatal action errors.
- Enhanced API error messages to include the service URL for better diagnostic visibility.
- Updated all related tests to verify the new behavioral and message requirements.