- drop unused allScoredRecords/groups from audit results
- add slimAuditRecord/toPersistedAuditResult to strip derived fields
  (mdContent/searchText) before attaching results to messages
- sanitize legacy messages when loading conversations so stored
  oversized results are replaced on next save

- Add AI-driven audit analysis engine with batched semantic selection
- Introduce shared audit skill (public markdown file) with business
  filter rules, skill upload in prompt config dialog, and rule matching
- Add risk point "exclude and remember" action writing back to skill
- Support configurable Word report style (fonts, spacing, margins)
- Include AI analysis summary and skill rules in Markdown/Excel/Word exports
- Persist skill object via DataService (ai_skill subject)