feat: La Suite email/messages, buildkitd, monitoring, vault and storage updates

- Add Messages (email) service: backend, frontend, MTA in/out, MPA, SOCKS
  proxy, worker, DKIM config, and theme customization
- Add Collabora deployment for document collaboration
- Add Drive frontend nginx config and values
- Add buildkitd namespace for in-cluster container builds
- Add SeaweedFS remote sync and additional S3 buckets
- Update vault secrets across namespaces (devtools, lasuite, media,
  monitoring, ory, storage) with expanded credential management
- Update monitoring: rename grafana→metrics OAuth2Client, add Prometheus
  remote write and additional scrape configs
- Update local/production overlays with resource patches
- Remove stale login-ui resource patch from production overlay

base/lasuite/messages-frontend-deployment.yaml

@@ -0,0 +1,53 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: messages-frontend
+  namespace: lasuite
+spec:
+  replicas: 1
+  selector:
+    matchLabels:
+      app: messages-frontend
+  template:
+    metadata:
+      labels:
+        app: messages-frontend
+    spec:
+      containers:
+        - name: messages-frontend
+          image: messages-frontend
+          ports:
+            - containerPort: 8080
+          env:
+            - name: MESSAGES_FRONTEND_BACKEND_SERVER
+              value: messages-backend.lasuite.svc.cluster.local:80
+            - name: PORT
+              value: "8080"
+          livenessProbe:
+            httpGet:
+              path: /
+              port: 8080
+            initialDelaySeconds: 10
+            periodSeconds: 20
+          readinessProbe:
+            httpGet:
+              path: /
+              port: 8080
+            initialDelaySeconds: 5
+            periodSeconds: 10
+          volumeMounts:
+            - name: theme
+              mountPath: /app/sunbeam-theme.css
+              subPath: sunbeam-theme.css
+              readOnly: true
+          resources:
+            limits:
+              memory: 256Mi
+              cpu: 250m
+            requests:
+              memory: 64Mi
+              cpu: 50m
+      volumes:
+        - name: theme
+          configMap:
+            name: messages-frontend-theme