gsxdsm
fb8e77290b
feat(FN-1368): add milestone and slice interview sessions
- Create milestone-slice-interview.ts module for AI-guided milestone/slice planning
- Add interview session types (milestone_interview, slice_interview) to AiSessionStore
- Wire up server rehydration and automatic session cleanup
- Add milestone/slice interview routes to mission router with SSE streaming
- Extend MissionStore to persist planningNotes and verification fields
- Add comprehensive tests for milestone-slice interview engine