Fix: HelmRelease reconciliation on ConfigMap changes

- Reduce HelmRelease interval from 1h to 5m for faster sync
- Add checksum annotation to trigger reconciliation when element-values.yaml changes
- This ensures Flux CD re-deploys the chart when themes/config updates are made

To update the checksum after editing element-values.yaml:
  md5sum apps/production/custom-configs/element-values.yaml
  # Update the value in apps/production/kustomization.yaml patches[0].patch

Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>

apps/production/element-server-suite.yaml

@@ -4,7 +4,7 @@ metadata:
   name: matrix-stack
   namespace: matrix
 spec:
-  interval: 1h
+  interval: 5m
   chart:
     spec:
       chart: matrix-stack

apps/production/kustomization.yaml

@@ -1,5 +1,18 @@
 apiVersion: kustomize.config.k8s.io/v1beta1
 kind: Kustomization
+
+# Patch: Fügt einen Checksum der element-values.yaml zur HelmRelease hinzu
+# Damit wird Flux die HelmRelease neu-synced wenn sich die ConfigMap ändert
+patches:
+  - target:
+      kind: HelmRelease
+      name: matrix-stack
+      namespace: matrix
+    patch: |-
+      - op: add
+        path: /metadata/annotations/element-config-checksum
+        value: "401f8a87d0ef5d91d2e5032d4aede42c"
+
 resources:
   - matrix-postgres-auth.yaml
   - cert-issuer.yaml