feat: robust scraping DSL and health monitoring (Phase 2)

- Implemented YAML-driven GenericScraper for resilient scraping
- Added ProvidersManager to manage scraper health and active providers
- Modernized unified search with systematic Kitsu metadata enrichment
- Integrated automated health checks in the scheduler
- Added comprehensive tests for scraping DSL and provider health

tests/test_metadata_enrichment.py

@@ -72,7 +72,6 @@ def mock_kitsu_api_raw():
     }
 
 
-@pytest.mark.skip(reason="New tests for non-implemented feature")
 class TestMetadataEnricher:
     """Test MetadataEnricher functionality."""
 
@@ -389,7 +388,6 @@ class TestMetadataEnricher:
             assert result.rating is None
 
 
-@pytest.mark.skip(reason="New tests for non-implemented feature")
 class TestMetadataEnrichmentIntegration:
     """Integration tests for metadata enrichment."""