- SUMMARY.md documents 7 service files updated with userId parameter
- STATE.md advanced to plan 2 of 4 in phase 16
- ROADMAP.md updated with plan progress
- Requirements MULTI-01, MULTI-02, MULTI-03, MULTI-06 marked complete
- Add 16-01-SUMMARY.md with schema, middleware, and test changes
- Update STATE.md with phase 16 progress and decisions
- Update ROADMAP.md with plan progress (1/4 complete)
- Mark MULTI-01, MULTI-04, MULTI-06 complete in REQUIREMENTS.md