Tasks: workspace deps / C extractor / C++ extractor / C chunker + snapshot / C++ chunker + snapshot / ingest dispatch + tier3_fallback_cv extension / 2 smoke tests / frozen design §10 / docs sync / workspace test gate / version bump 0.15.0 → 0.16.0 + gitea PR. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>