- Add RateLimitError import and _make_request wrapper method to handle rate limiting
- Update API methods to use _make_request wrapper instead of direct downloader calls
- Add explicit RateLimitError handling in API methods to properly propagate rate limit errors
- Add _extract_retry_after method to parse Retry-After headers
- Improve error handling by surfacing rate limit information to callers
These changes ensure that rate limiting from the Civitai API is properly detected and handled, allowing callers to implement appropriate backoff strategies when rate limits are encountered.
Refactor metadata sync service to use a prioritized provider fallback system when handling deleted CivitAI models. The new approach:
1. Attempts civarchive_api provider first for deleted models
2. Falls back to sqlite provider if archive DB is enabled
3. Maintains existing default provider behavior for non-deleted models
4. Tracks provider attempts and errors for better debugging
This improves reliability when fetching metadata for deleted models by trying multiple sources before giving up, and provides clearer error messages based on which providers were attempted.
