refactor: Kubernetes-Ressourcen und Images heissen artista-filmcamp

Alle Ressourcen tragen den Praefix artista-filmcamp- (Deployment,
Service, StatefulSet, CronJobs, PVCs, ConfigMap, Secret, Ingress,
NetworkPolicies, Middleware) und liegen im Namespace artista. Die Images
heissen wieder <owner>/artista-filmcamp und <owner>/artista-filmcamp-tools,
passend zum Repo. DATABASE_URL-Host, Backup-Host und Betriebsdoku
entsprechend angepasst.

Co-Authored-By: Claude Opus 5.5 (1M context) <[email protected]>

k8s/base/kustomization.yaml

@@ -10,5 +10,5 @@ resources:
   - jobs.yaml
 labels:
   - pairs:
-      app.kubernetes.io/part-of: artista-modelcamp
+      app.kubernetes.io/part-of: artista-filmcamp
     includeSelectors: false