docs(09): create phase plan

Phase 09: CI Pipeline Hardening
- 4 plan(s) in 3 wave(s)
- Wave 1: Infrastructure setup (09-01)
- Wave 2: Tests in parallel (09-02, 09-03)
- Wave 3: CI integration (09-04)
- Ready for execution

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

.planning/ROADMAP.md

@@ -106,11 +106,13 @@ Plans:
   3. Pipeline fails before Docker build when unit tests fail
   4. Pipeline fails before Docker build when type checking fails
   5. E2E tests run in pipeline using Playwright Docker image
-**Plans**: TBD
+**Plans**: 4 plans
 
 Plans:
-- [ ] 09-01: Vitest setup and unit test structure
-- [ ] 09-02: Pipeline integration with fail-fast behavior
+- [ ] 09-01-PLAN.md — Test infrastructure setup (Vitest + browser mode)
+- [ ] 09-02-PLAN.md — Unit and component test suite with coverage
+- [ ] 09-03-PLAN.md — E2E test suite with database fixtures
+- [ ] 09-04-PLAN.md — CI pipeline integration with fail-fast behavior
 
 ## Progress
 
@@ -127,13 +129,14 @@ Phases execute in numeric order: 7 -> 8 -> 9
 | 6. Deployment | v1.0 | 2/2 | Complete | 2026-02-01 |
 | 7. GitOps Foundation | v2.0 | 2/2 | Complete ✓ | 2026-02-03 |
 | 8. Observability Stack | v2.0 | 0/3 | Planned | - |
-| 9. CI Pipeline Hardening | v2.0 | 0/2 | Not started | - |
+| 9. CI Pipeline Hardening | v2.0 | 0/4 | Planned | - |
 
 ---
 *Roadmap created: 2026-01-29*
 *v2.0 phases added: 2026-02-03*
 *Phase 7 planned: 2026-02-03*
 *Phase 8 planned: 2026-02-03*
+*Phase 9 planned: 2026-02-03*
 *Depth: standard*
 *v1.0 Coverage: 31/31 requirements mapped*
 *v2.0 Coverage: 17/17 requirements mapped*