outline: migrate to envFrom with per-container InfisicalSecrets

All 31 env entries, secrets and literals alike, now live in Infisical under /outline/outline and /outline/postgres. Manifest rationale carried across as Infisical secret comments.

applications/outline/postgres/infisicalsecret.yaml

@@ -0,0 +1,25 @@
+apiVersion: secrets.infisical.com/v1alpha1
+kind: InfisicalSecret
+metadata:
+  name: outline-postgres-secrets
+  namespace: infisical
+spec:
+  hostAPI: https://infisical.jsme.be
+  resyncInterval: 30
+  authentication:
+    kubernetesAuth:
+      identityId: "5458def7-7c63-40d2-95da-41c614d0933a"
+      serviceAccountRef:
+        name: infisical-auth
+        namespace: infisical
+      autoCreateServiceAccountToken: true
+      secretsScope:
+        projectSlug: "kubernetes"
+        envSlug: "prod"
+        secretsPath: "/outline/postgres"
+        # Non-recursive: keys are already named as the container expects.
+        recursive: false
+  managedSecretReference:
+    secretName: outline-postgres-secrets
+    secretNamespace: outline
+    secretType: Opaque

applications/outline/postgres/outline-postgres-statefulset.yaml

@@ -31,24 +31,9 @@ spec:
           volumeMounts:
             - name: outline-postgres-data
               mountPath: /var/lib/postgresql/data
-          env:
-            - name: PGDATA
-              value: "/var/lib/postgresql/data/pgdata"
-            - name: POSTGRES_USER
-              valueFrom:
-                secretKeyRef:
-                  name: outline-secrets
-                  key: db_user
-            - name: POSTGRES_PASSWORD
-              valueFrom:
-                secretKeyRef:
-                  name: outline-secrets
-                  key: db_password
-            - name: POSTGRES_DB
-              valueFrom:
-                secretKeyRef:
-                  name: outline-secrets
-                  key: db_name
+          envFrom:
+            - secretRef:
+                name: outline-postgres-secrets
       volumes:
         - name: outline-postgres-data
           persistentVolumeClaim: