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

clusters/cl01tl/helm/paperless-ngx/Chart.lock

@@ -4,7 +4,7 @@ dependencies:
   version: 5.0.1
 - name: postgres-cluster
   repository: oci://harbor.alexlebens.net/helm-charts
-  version: 7.14.0
+  version: 7.15.0
 - name: valkey
   repository: oci://harbor.alexlebens.net/helm-charts
   version: 0.8.0
@@ -20,5 +20,5 @@ dependencies:
 - name: volsync-target
   repository: oci://harbor.alexlebens.net/helm-charts
   version: 2.0.0
-digest: sha256:4605ea22803024f06323e18ab5baabe31cd48d2078fe4b0e536c2732bb3d8229
-generated: "2026-05-18T20:34:07.556536-05:00"
+digest: sha256:1c42441e106a0c58b4831e1a957ab0ba10c9c3f3ebb99571dd84a330f5103bc2
+generated: "2026-05-19T16:32:19.671233373Z"