The block/ID/file-URL matching moves out of MediaUsageFinder into a static class; the finder keeps queries, limits and result building. Behaviour unchanged; direct tests for the matcher added. Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01At3V6SjwbMe6eMzVGW3Hs7