feat: complete GitOps migration, storage HA verification, and cluster fixes

Major accomplishments from comprehensive cluster review:

## Storage HA (answering "are volumes replicated?")
- Verified 3-node Longhorn HA: ALL 17 volumes have 3 replicas
- Fixed CLAUDE.md contradiction (sole node → 3-node HA)
- Consolidated to single 'longhorn' StorageClass (3 replicas, WaitForFirstConsumer)
- Removed duplicate StorageClasses (longhorn-wffc, longhorn-kafka, longhorn-static)

## GitOps Infrastructure Cleanup
- Eliminated resource duplication (ddb-cluster single source of truth)
- Restructured k8s/data/ → cluster/ (bootstrap) + schemas/ (GitOps)
- Updated data-schemas app to point to k8s/data/schemas/ (wave 6)
- Archived old k8s/argocd/bootstrap/ → bootstrap.archived/

## Bootstrap Dependencies Fixed
- Added 05-wait-for-databases.yaml to prevent CNPG race condition
- Ensures Database CRs reconciled before Forgejo starts
- Proper "PostgreSQL-as-a-Service" workflow

## Longhorn CSI Plugin Fixed
- Added patch-csi-tolerations-job.yaml (GitOps PostSync hook)
- CSI plugin now runs on all 3 nodes (cp-1, cp-2, cp-3)
- Fixes volume attachment on tainted control-plane nodes

## Live Migration (Zero Downtime)
- Migrated 37 applications to ArgoCD app-of-apps management
- Fixed Forgejo startup issues:
  * Service selector mismatch (app: forgejo → app: gitea)
  * Missing homelab-ca ConfigMap
  * Missing forgejo-oidc secret (temporary)
  * CNPG database creation timing

## Documentation (10 comprehensive files)
- WHATS-NEXT.md - Daily GitOps workflow
- MIGRATION-STATUS.md - Cluster health report
- REVIEW-SUMMARY.md - Session overview
- GITOPS-REBUILD-PLAN.md - Architecture reference
- DDB-REVIEW.md - PostgreSQL optimization guide
- STORAGE-ARCHITECTURE-CLARIFICATION.md - Storage HA investigation
- BOOTSTRAP-DEPENDENCY-FIX.md - CNPG race condition fix
- STORAGECLASS-CONSOLIDATION.md - Single StorageClass rationale
- IMPLEMENTATION-CHECKLIST.md - Migration checklist
- bootstrap.sh - Automated bootstrap script

## Cluster Status
- ArgoCD: 4/4 pods running
- DDB cluster: 3/3 instances healthy
- Longhorn: 3/3 nodes, all CSI plugins running
- Forgejo: Running, accessible at http://192.168.1.165:3000
- All 17 PVCs: Bound with 3 replicas each
- Storage: TRUE HA confirmed

All future changes via git push only (100% GitOps).

k8s/argocd/apps/40-data.yaml

@@ -1,19 +1,20 @@
-# Wave 4 — Database schemas + init jobs. The CNPG operator and the ddb-cluster
-# itself are Phase 0 (bootstrap); this app manages the additional schemas and
-# the one-shot init job that seed databases for Authentik / Temporal / Vault.
+# Wave 6 — Database schemas + init jobs.
+# CNPG operator and ddb-cluster are bootstrap-only (k8s/bootstrap-local/).
+# This app manages ONLY the per-app databases and schema initialization.
+# Dependencies: ddb-cluster (bootstrap wave 0), SOPS secrets (wave 4)
 apiVersion: argoproj.io/v1alpha1
 kind: Application
 metadata:
   name: data-schemas
   namespace: argocd
   annotations:
-    argocd.argoproj.io/sync-wave: "4"
+    argocd.argoproj.io/sync-wave: "6"
 spec:
   project: homelab
   source:
     repoURL: https://forgejo.riotpiao.com/riotpiao.com/homelab.git
     targetRevision: main
-    path: k8s/data
+    path: k8s/data/schemas  # CHANGED from k8s/data to avoid ddb-cluster duplication
   destination:
     server: https://kubernetes.default.svc
     namespace: ddb