feat(lasuite): add calendars service deployment manifests

Add K8s manifests for calendars backend, frontend (Caddy), CalDAV
server, and Celery worker. Wire Pingora routing for cal.sunbeam.pt
with path-based backend/caldav/static splits. Add OAuth2Client for
OIDC, VaultDynamicSecret for DB credentials, VaultStaticSecret for
Django/CalDAV keys, and TLS cert coverage for the cal subdomain.
Register calendars in the integration service gaufre widget.

base/lasuite/calendars-caldav-deployment.yaml

@@ -0,0 +1,97 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: calendars-caldav
+  namespace: lasuite
+spec:
+  replicas: 1
+  selector:
+    matchLabels:
+      app: calendars-caldav
+  template:
+    metadata:
+      labels:
+        app: calendars-caldav
+    spec:
+      initContainers:
+        - name: init-database
+          image: calendars-caldav
+          command: ["/usr/local/bin/init-database.sh"]
+          env:
+            - name: PGHOST
+              valueFrom:
+                configMapKeyRef:
+                  name: lasuite-postgres
+                  key: DB_HOST
+            - name: PGPORT
+              valueFrom:
+                configMapKeyRef:
+                  name: lasuite-postgres
+                  key: DB_PORT
+            - name: PGDATABASE
+              value: calendars_db
+            - name: PGUSER
+              value: calendars
+            - name: PGPASSWORD
+              valueFrom:
+                secretKeyRef:
+                  name: calendars-db-credentials
+                  key: password
+          resources:
+            limits:
+              memory: 128Mi
+              cpu: 100m
+            requests:
+              memory: 64Mi
+              cpu: 10m
+      containers:
+        - name: calendars-caldav
+          image: calendars-caldav
+          ports:
+            - containerPort: 80
+          env:
+            - name: PGHOST
+              valueFrom:
+                configMapKeyRef:
+                  name: lasuite-postgres
+                  key: DB_HOST
+            - name: PGPORT
+              valueFrom:
+                configMapKeyRef:
+                  name: lasuite-postgres
+                  key: DB_PORT
+            - name: PGDATABASE
+              value: calendars_db
+            - name: PGUSER
+              value: calendars
+            - name: PGPASSWORD
+              valueFrom:
+                secretKeyRef:
+                  name: calendars-db-credentials
+                  key: password
+            - name: CALDAV_INBOUND_API_KEY
+              valueFrom:
+                secretKeyRef:
+                  name: calendars-django-secret
+                  key: CALDAV_INBOUND_API_KEY
+            - name: CALDAV_OUTBOUND_API_KEY
+              valueFrom:
+                secretKeyRef:
+                  name: calendars-django-secret
+                  key: CALDAV_OUTBOUND_API_KEY
+            - name: CALDAV_INTERNAL_API_KEY
+              valueFrom:
+                secretKeyRef:
+                  name: calendars-django-secret
+                  key: CALDAV_INTERNAL_API_KEY
+            - name: CALDAV_BASE_URI
+              value: /caldav/
+            - name: CALLBACK_BASE_URL
+              value: http://calendars-backend.lasuite.svc.cluster.local:8000
+          resources:
+            limits:
+              memory: 256Mi
+              cpu: 300m
+            requests:
+              memory: 128Mi
+              cpu: 50m