Bump remaining apps: major version slots and infrastructure

New version slots (major version jumps):
- gitea: 1.24.3 -> 28.2.0 (slot 1 -> 28)
- ghost: 5.130.6 -> 6.72.0 (slot 5 -> 6)
- formbricks: 3.6.0 -> 6.1.0 (slot 3 -> 6)
- mattermost: 10.8.1 -> 12.0.1 (slot 10 -> 12)
- zulip: 9.4 -> 12.3 (slot 9 -> 12)
- immich: 1.135.3 -> 3.3.5 (slot 1 -> 3)
- openproject: 16.1.1 -> 17.9.3 (slot 16 -> 17)
- listmonk: 5.0.3 -> 6.1.0 (slot 5 -> 6)
- discourse: 3.5.3 -> 2026.10.0 (slot 3 -> 2026, calver)

Same-slot large bumps:
- vllm: 0.9.2 -> 0.32.0
- longhorn: v1.8.1 -> v1.13.0

Infrastructure:
- cert-manager: v1.17.2 -> v1.21.2
- coredns: v1.12.0 -> v1.14.7
- externaldns: v0.13.4 -> v0.23.0
- metallb: v0.15.0 -> v0.16.1
- mysql: 9.1.0 -> 9.7.4
- node-feature-discovery: v0.17.3 -> v0.20.1
- nvidia-device-plugin: v0.17.1 -> v0.20.1

zulip/versions/12/deployment.yaml

@@ -0,0 +1,145 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: zulip
+  namespace: {{ .namespace }}
+spec:
+  replicas: 1
+  strategy:
+    type: Recreate
+  selector:
+    matchLabels:
+      component: web
+  template:
+    metadata:
+      labels:
+        component: web
+    spec:
+      securityContext:
+        runAsNonRoot: false
+        runAsUser: 0
+        seccompProfile:
+          type: RuntimeDefault
+      containers:
+        - name: zulip
+          image: zulip/docker-zulip:12.3-0
+          ports:
+            - name: http
+              containerPort: 80
+              protocol: TCP
+          env:
+            - name: SETTING_ZULIP_ADMINISTRATOR
+              value: "{{ .adminEmail }}"
+            - name: ZULIP_PASSWORD
+              valueFrom:
+                secretKeyRef:
+                  name: zulip-secrets
+                  key: adminPassword
+            - name: SETTING_EXTERNAL_HOST
+              value: "{{ .domain }}"
+            - name: SSL_CERTIFICATE_GENERATION
+              value: "self-signed"
+            - name: SECRETS_secret_key
+              valueFrom:
+                secretKeyRef:
+                  name: zulip-secrets
+                  key: secretKey
+            # Database
+            - name: DB_HOST
+              value: "{{ .db.host }}"
+            - name: DB_HOST_PORT
+              value: "{{ .db.port }}"
+            - name: DB_NAME
+              value: "{{ .db.name }}"
+            - name: DB_USER
+              value: "{{ .db.user }}"
+            - name: SECRETS_postgres_password
+              valueFrom:
+                secretKeyRef:
+                  name: zulip-secrets
+                  key: postgresPassword
+            # RabbitMQ
+            - name: SETTING_RABBITMQ_HOST
+              value: "{{ .rabbitmq.host }}"
+            - name: SETTING_RABBITMQ_USER
+              value: "{{ .rabbitmq.user }}"
+            - name: SECRETS_rabbitmq_password
+              valueFrom:
+                secretKeyRef:
+                  name: zulip-secrets
+                  key: rabbitmqPassword
+            # Redis
+            - name: SETTING_REDIS_HOST
+              value: "{{ .redis.host }}"
+            - name: SECRETS_redis_password
+              valueFrom:
+                secretKeyRef:
+                  name: zulip-secrets
+                  key: redis.password
+            # Memcached
+            - name: SETTING_MEMCACHED_LOCATION
+              value: "{{ .memcached.host }}:11211"
+            # Email
+            - name: SETTING_EMAIL_HOST
+              value: "{{ .smtp.host }}"
+            - name: SETTING_EMAIL_HOST_USER
+              value: "{{ .smtp.user }}"
+            - name: SETTING_EMAIL_PORT
+              value: "{{ .smtp.port }}"
+            - name: SETTING_EMAIL_USE_TLS
+              value: "True"
+            - name: SETTING_EMAIL_BACKEND
+              value: "django.core.mail.backends.smtp.EmailBackend"
+            - name: SETTING_DEFAULT_FROM_EMAIL
+              value: "{{ .smtp.from }}"
+            - name: SECRETS_email_password
+              valueFrom:
+                secretKeyRef:
+                  name: zulip-secrets
+                  key: smtp.password
+            # Reverse proxy configuration (Traefik terminates TLS)
+            - name: DISABLE_HTTPS
+              value: "true"
+            - name: LOADBALANCER_IPS
+              value: "10.244.0.0/16"
+          resources:
+            limits:
+              cpu: "2"
+              ephemeral-storage: 1Gi
+              memory: 3Gi
+            requests:
+              cpu: 50m
+              ephemeral-storage: 100Mi
+              memory: 512Mi
+          volumeMounts:
+            - name: zulip-data
+              mountPath: /data
+          livenessProbe:
+            httpGet:
+              path: /accounts/home/
+              port: 80
+              httpHeaders:
+                - name: Host
+                  value: "{{ .domain }}"
+            initialDelaySeconds: 180
+            timeoutSeconds: 30
+            periodSeconds: 30
+            failureThreshold: 6
+          readinessProbe:
+            httpGet:
+              path: /accounts/home/
+              port: 80
+              httpHeaders:
+                - name: Host
+                  value: "{{ .domain }}"
+            initialDelaySeconds: 120
+            timeoutSeconds: 30
+            periodSeconds: 15
+            failureThreshold: 6
+          securityContext:
+            readOnlyRootFilesystem: false
+      volumes:
+        - name: zulip-data
+          persistentVolumeClaim:
+            claimName: zulip-data
+      restartPolicy: Always