Implements autonomous research pipeline that chains:
- Check local knowledge (semantic memory cache, confidence > 0.85)
- Generate queries via LLM cascade
- Web search (concurrent, deduplicated)
- Fetch top pages
- Synthesize structured report via LLM
- Crystallize results in semantic memory
- Write artifact (create Gitea issues from action items)
Includes full unit test suite (25 tests) covering all pipeline steps,
cache hits, graceful degradation, and Gitea integration.
Fixes#975
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>