docs(07): complete GitOps Foundation phase

Phase 7 verified:
- GITOPS-01: ArgoCD server running ✓
- GITOPS-02: Auto-sync verified (137s response time) ✓
- GITOPS-03: Self-heal verified (pod restored) ✓
- GITOPS-04: ArgoCD UI accessible ✓

All 5/5 must-haves passed.

.planning/ROADMAP.md

@@ -57,7 +57,7 @@ Decimal phases appear between their surrounding integers in numeric order.
 
 **Milestone Goal:** Production-grade operations with GitOps deployment, observability stack, and CI test pipeline
 
-- [ ] **Phase 7: GitOps Foundation** - ArgoCD deployment automation with Git as source of truth
+- [x] **Phase 7: GitOps Foundation** - ArgoCD deployment automation with Git as source of truth ✓
 - [ ] **Phase 8: Observability Stack** - Metrics, dashboards, logs, and alerting
 - [ ] **Phase 9: CI Pipeline Hardening** - Automated testing before build
 
@@ -76,8 +76,8 @@ Decimal phases appear between their surrounding integers in numeric order.
 **Plans**: 2 plans
 
 Plans:
-- [ ] 07-01-PLAN.md — Register TaskPlanner Application with ArgoCD
-- [ ] 07-02-PLAN.md — Verify auto-sync and self-heal behavior
+- [x] 07-01-PLAN.md — Register TaskPlanner Application with ArgoCD
+- [x] 07-02-PLAN.md — Verify auto-sync and self-heal behavior
 
 ### Phase 8: Observability Stack
 **Goal**: Full visibility into cluster and application health via metrics, logs, and dashboards
@@ -125,7 +125,7 @@ Phases execute in numeric order: 7 -> 8 -> 9
 | 4. Tags & Organization | v1.0 | 3/3 | Complete | 2026-01-31 |
 | 5. Search | v1.0 | 3/3 | Complete | 2026-01-31 |
 | 6. Deployment | v1.0 | 2/2 | Complete | 2026-02-01 |
-| 7. GitOps Foundation | v2.0 | 0/2 | Planned | - |
+| 7. GitOps Foundation | v2.0 | 2/2 | Complete ✓ | 2026-02-03 |
 | 8. Observability Stack | v2.0 | 0/3 | Not started | - |
 | 9. CI Pipeline Hardening | v2.0 | 0/2 | Not started | - |