docs(06.2): capture phase context + fix admin user creation 500

- Phase 6.2 CONTEXT.md: cloud-delete propagation, SHARE-03/05, audit
  log CSV export fix, daily export UI, user handle display
- Fix: admin create_user missing session.flush() before write_audit_log
  caused FK violation on PostgreSQL (silent on SQLite)
- Regression test: test_create_user_writes_audit_log in test_admin_api.py

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

.planning/ROADMAP.md

@@ -318,6 +318,26 @@ Before any phase is marked complete, all three gates must pass:
 
 ---
 
+### Phase 6.2: Close v1 sharing + cloud-delete + CSV export gaps
+
+**Goal**: Close remaining v1 gaps — sharing edge cases, cloud document deletion propagation to the remote backend, and CSV export for the admin audit log.
+**Mode:** mvp
+**Depends on**: Phase 6.1
+**Requirements**: TBD
+
+**Success Criteria** (what must be TRUE):
+
+1. TBD
+
+**Plans**: TBD
+
+**Phase gates (must pass before Phase 6.2 is complete):**
+
+- [ ] `pytest -v` — zero failures
+- [ ] Security agent: bandit + pip audit + npm audit all clean
+
+---
+
 ## Progress Table
 
 | Phase | Plans Complete | Status | Completed |
@@ -329,3 +349,4 @@ Before any phase is marked complete, all three gates must pass:
 | 5. Cloud Storage Backends | 12/12 | Complete | 2026-05-30 |
 | 6. Performance & Production Hardening | 0/TBD | Not started | — |
 | 6.1. Close v1.0 audit gaps | 2/2 | Complete | 2026-05-30 |
+| 6.2. Close v1 sharing + cloud-delete + CSV export gaps | 0/TBD | Not started | — |