infisical: bring self-hosted stack under GitOps (postgres, valkey, backend); secret.yaml excluded template

applications/infisical/postgres/service.yaml

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+apiVersion: v1
+kind: Service
+metadata:
+  name: infisical-postgres
+  namespace: infisical
+  labels:
+    app: infisical-postgres
+spec:
+  selector:
+    app: infisical-postgres
+  ports:
+    - name: postgres
+      port: 5432
+      targetPort: 5432

applications/infisical/postgres/statefulset.yaml

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+apiVersion: apps/v1
+kind: StatefulSet
+metadata:
+  name: infisical-postgres
+  namespace: infisical
+spec:
+  serviceName: infisical-postgres
+  replicas: 1
+  selector:
+    matchLabels:
+      app: infisical-postgres
+  template:
+    metadata:
+      labels:
+        app: infisical-postgres
+    spec:
+      containers:
+        - name: postgres
+          image: postgres:14-alpine
+          ports:
+            - containerPort: 5432
+          env:
+            # Keep data in a subdir so an RWO volume's lost+found doesn't block initdb
+            - name: PGDATA
+              value: /var/lib/postgresql/data/pgdata
+            - name: POSTGRES_USER
+              valueFrom:
+                secretKeyRef:
+                  name: infisical-secrets
+                  key: POSTGRES_USER
+            - name: POSTGRES_PASSWORD
+              valueFrom:
+                secretKeyRef:
+                  name: infisical-secrets
+                  key: POSTGRES_PASSWORD
+            - name: POSTGRES_DB
+              valueFrom:
+                secretKeyRef:
+                  name: infisical-secrets
+                  key: POSTGRES_DB
+          volumeMounts:
+            - name: data
+              mountPath: /var/lib/postgresql/data
+          readinessProbe:
+            exec:
+              command: ["sh", "-c", "pg_isready -U $POSTGRES_USER -d $POSTGRES_DB"]
+            initialDelaySeconds: 5
+            periodSeconds: 5
+            timeoutSeconds: 10
+            failureThreshold: 10
+          livenessProbe:
+            exec:
+              command: ["sh", "-c", "pg_isready -U $POSTGRES_USER -d $POSTGRES_DB"]
+            initialDelaySeconds: 30
+            periodSeconds: 15
+  volumeClaimTemplates:
+    - metadata:
+        name: data
+      spec:
+        accessModes: ["ReadWriteOnce"]
+        storageClassName: longhorn
+        resources:
+          requests:
+            storage: 8Gi