Merge pull request 'chore(deps): Update ghcr.io/cloudnative-pg/postgresql Docker tag to v16.15' (#124) from renovate/ghcr.io-cloudnative-pg-postgresql-16.x into main

Reviewed-on: #124

apps/wave-0/nextcloud-db.yaml

@@ -48,7 +48,7 @@ spec:
   # Scaling out is non-disruptive: CNPG creates -2 then -3 sequentially, each seeded by
   # pg_basebackup from the running primary, which is neither restarted nor disconnected.
   instances: 3
-  imageName: ghcr.io/cloudnative-pg/postgresql:16.4
+  imageName: ghcr.io/cloudnative-pg/postgresql:16.15
   # Stamp app.kubernetes.io/name=nextcloud-db onto every generated pod/service so the rendered
   # nextcloud egress CiliumNetworkPolicy's toEndpoints selector matches the primary pod (R-NET-02).
   inheritedMetadata:
@@ -300,7 +300,7 @@ spec:
               # is already in it and it is already present on every node, so this
               # adds no new image and no new supply-chain surface. Keep the tag in
               # step with spec.imageName above when Renovate bumps it.
-              image: ghcr.io/cloudnative-pg/postgresql:16.4
+              image: ghcr.io/cloudnative-pg/postgresql:16.15
               imagePullPolicy: IfNotPresent
               command:
                 - psql

apps/wave-0/semaphore-db.yaml

@@ -49,7 +49,7 @@ spec:
   # Scaling out is non-disruptive: CNPG creates -2 then -3 sequentially, each seeded by
   # pg_basebackup from the running primary, which is neither restarted nor disconnected.
   instances: 3
-  imageName: ghcr.io/cloudnative-pg/postgresql:16.4
+  imageName: ghcr.io/cloudnative-pg/postgresql:16.15
   # Stamp app.kubernetes.io/name=semaphore-db onto every generated pod/service so the rendered
   # semaphore egress CiliumNetworkPolicy's toEndpoints selector matches the primary pod (R-NET-02).
   inheritedMetadata:

platform/keycloak/postgres-cluster.yaml

@@ -41,7 +41,7 @@ spec:
   # not disconnected. (The anti-affinity change is a separate commit precisely because that one DOES
   # cause a switchover — see it for the blast radius.)
   instances: 3
-  imageName: ghcr.io/cloudnative-pg/postgresql:16.4
+  imageName: ghcr.io/cloudnative-pg/postgresql:16.15
   # HARD anti-affinity — the three instances MUST land on three DIFFERENT nodes (2026-09-07).
   #
   # CNPG's default is `preferred`, which is only a scheduler HINT: the scheduler may put two