chore(deps): update postgres-cluster docker tag to v7.15.0

clusters/cl01tl/helm/dawarich/Chart.lock

@@ -4,7 +4,7 @@ dependencies:
   version: 5.0.1
 - name: postgres-cluster
   repository: oci://harbor.alexlebens.net/helm-charts
-  version: 7.13.3
+  version: 7.15.0
 - name: valkey
   repository: oci://harbor.alexlebens.net/helm-charts
   version: 0.8.0
@@ -17,5 +17,5 @@ dependencies:
 - name: volsync-target
   repository: oci://harbor.alexlebens.net/helm-charts
   version: 2.0.0
-digest: sha256:c8046640e96e28b689f00cbbc557e65f6fdb7719a9341a3b2edab345a0e86fca
-generated: "2026-05-18T20:34:44.045865421Z"
+digest: sha256:2463c5c7f9d43539f2f0bda9a59ce391d6c45e328b8a7cbfeae2991128983978
+generated: "2026-05-19T00:49:11.820615847Z"