Refactor facets instruction config: use boolean values and fix facet param
- Change facets schema from strings to: false | true | "full"
- false: skip facet context
- true: include with names only (default)
- "full": include with full descriptions
- Fix bug: pass facet param to compose_instructions() in assemble_inputs()
so multi-facet generators get focused facet context
- Add detailed param to facet_summary() for short vs full mode
- Update all 21 muse/*.md generators to use new boolean format
- Add test for facet_summary short mode
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>