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/data/schemas/authentik-database.yaml

@@ -0,0 +1,10 @@
+apiVersion: postgresql.cnpg.io/v1
+kind: Database
+metadata:
+  name: authentik
+  namespace: ddb
+spec:
+  name: authentik
+  owner: authentik
+  cluster:
+    name: ddb-cluster

k8s/data/schemas/db-init-job.yaml

@@ -0,0 +1,67 @@
+apiVersion: batch/v1
+kind: Job
+metadata:
+  name: db-schema-init
+  namespace: ddb
+  labels:
+    app: postgresql-init
+    layer: data
+spec:
+  backoffLimit: 3
+  ttlSecondsAfterFinished: 3600  # Keep Job for 1 hour after completion
+  template:
+    metadata:
+      labels:
+        app: postgresql-init
+    spec:
+      serviceAccountName: default
+      restartPolicy: Never
+      containers:
+      - name: schema-init
+        image: postgres:16.2-alpine
+        env:
+        - name: PGHOST
+          value: ddb-cluster-rw.ddb.svc.cluster.local
+        - name: PGPORT
+          value: "5432"
+        - name: PGDATABASE
+          value: app
+        - name: PGUSER
+          value: app
+        - name: PGPASSWORD
+          valueFrom:
+            secretKeyRef:
+              name: ddb-cluster-app
+              key: password
+        command:
+        - /bin/sh
+        - -c
+        - |
+          # Wait for cluster to be ready
+          echo "Waiting for PostgreSQL to be ready..."
+          until pg_isready -h $PGHOST -p $PGPORT -U $PGUSER; do
+            echo "Waiting..."
+            sleep 5
+          done
+
+          echo "Creating schemas..."
+
+          # Create schemas from ConfigMap
+          psql -h $PGHOST -p $PGPORT -U $PGUSER -d $PGDATABASE << 'EOF'
+          CREATE SCHEMA IF NOT EXISTS authentik;
+          GRANT USAGE ON SCHEMA authentik TO app;
+          GRANT CREATE ON SCHEMA authentik TO app;
+
+          CREATE SCHEMA IF NOT EXISTS temporal;
+          GRANT USAGE ON SCHEMA temporal TO app;
+          GRANT CREATE ON SCHEMA temporal TO app;
+
+          CREATE SCHEMA IF NOT EXISTS vault;
+          GRANT USAGE ON SCHEMA vault TO app;
+          GRANT CREATE ON SCHEMA vault TO app;
+
+          GRANT USAGE ON SCHEMA public TO app;
+          GRANT CREATE ON SCHEMA public TO app;
+          EOF
+
+          echo "✓ Schema initialization complete"

k8s/data/schemas/kustomization.yaml

@@ -0,0 +1,17 @@
+apiVersion: kustomize.config.k8s.io/v1beta1
+kind: Kustomization
+metadata:
+  name: data-schemas
+
+namespace: ddb
+
+# GitOps-managed database schemas (ArgoCD wave 6).
+# These depend on ddb-cluster existing (bootstrap wave 0).
+resources:
+  - authentik-database.yaml
+  - temporal-database.yaml
+  - temporal-visibility-database.yaml
+  - schemas.yaml
+  - db-init-job.yaml
+
+# db-role-secrets.enc.yaml handled by SOPS secrets Application (wave 4)

k8s/data/schemas/schemas.yaml

@@ -0,0 +1,36 @@
+---
+# Schema initialization ConfigMap for PostgreSQL services
+# Services: Authentik, Vault (optional), Temporal, others
+# Applied via initdb Jobs after CNPG cluster is ready
+
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: db-schemas
+  namespace: ddb
+  labels:
+    app: postgresql-schemas
+data:
+  # Authentik schema (minimal — Authentik creates most tables via Django ORM)
+  authentik-init.sql: |
+    CREATE SCHEMA IF NOT EXISTS authentik;
+    GRANT USAGE ON SCHEMA authentik TO app;
+    GRANT CREATE ON SCHEMA authentik TO app;
+
+  # Temporal schema
+  temporal-init.sql: |
+    CREATE SCHEMA IF NOT EXISTS temporal;
+    GRANT USAGE ON SCHEMA temporal TO app;
+    GRANT CREATE ON SCHEMA temporal TO app;
+
+  # Vault schema (if using PostgreSQL backend)
+  vault-init.sql: |
+    CREATE SCHEMA IF NOT EXISTS vault;
+    GRANT USAGE ON SCHEMA vault TO app;
+    GRANT CREATE ON SCHEMA vault TO app;
+
+  # Application schema (generic)
+  app-init.sql: |
+    -- Default app schema (public)
+    GRANT USAGE ON SCHEMA public TO app;
+    GRANT CREATE ON SCHEMA public TO app;

k8s/data/schemas/temporal-database.yaml

@@ -0,0 +1,10 @@
+apiVersion: postgresql.cnpg.io/v1
+kind: Database
+metadata:
+  name: temporal
+  namespace: ddb
+spec:
+  name: temporal
+  owner: temporal
+  cluster:
+    name: ddb-cluster

k8s/data/schemas/temporal-visibility-database.yaml

@@ -0,0 +1,10 @@
+apiVersion: postgresql.cnpg.io/v1
+kind: Database
+metadata:
+  name: temporal-visibility
+  namespace: ddb
+spec:
+  name: temporal_visibility
+  owner: temporal
+  cluster:
+    name: ddb-cluster