feat: add multimodal search and granular performance diagnostics

docs/ROADMAP.md

@@ -38,10 +38,21 @@ Status: implementation started; no production release yet. Windows VM tests use
 - [ ] Watchers and reconciliation across Windows, macOS and Linux.
 
 ## 4. Media
+- [x] Genuine Google image, audio and video embeddings integrated with the shared
+  search service and CPU-tested FFmpeg decoding; music tags and duration filters.
+- [x] Frozen independent media corpus with retrieval, timestamp, negative-query
+  and indexing-cost measurements (see MEDIA-QUALITY.md).
+- [ ] Improve precise spoken-passage localization, music hard negatives and
+  calibrated handling of queries without a relevant match.
+- [ ] Package and verify decoders on every release OS; test production acceleration.
 - [ ] CPU OCR, image retrieval, audio transcription, video segment locations.
 - [ ] Isolated extraction workers with timeouts and resource ceilings.
 
 ## 5. Release gates
+- [x] Shared monotonic Basic/Debug search metrics, granular bounded engine traces,
+  actual worker query diagnostics, and headless JSON performance output.
+- [ ] Verify detailed performance UI interaction on native desktop platforms;
+  repeat overhead measurements on representative libraries and hardware.
 - [ ] Formatting, lint, tests and security/dependency review.
 - [ ] CPU benchmarks: filename p95 <50 ms/1M records; text <150 ms/100K documents; semantic <500 ms on declared hardware.
 - [ ] Measure cold start, indexing throughput, RAM, disk and idle CPU.