feat(platform): add Harbor container registry (the-seas) deployment

- Add Harbor v2.15.1 (chart 1.19.1) deployment to wave 7
- Service name: the-seas (EPCOT: The Seas with Nemo & Friends)
- Architecture: Embedded PostgreSQL, embedded Redis, single instance
- Storage: NFS via nfs-emporium StorageClass (130Gi total)
- Expose via Gateway API with dual DNS names
- Primary: the-seas.local.mk-labs.cloud
- Alternate: harbor.local.mk-labs.cloud
- ExternalSecret for 1Password integration (6 secrets)
- All image tags pinned to 2.15.1
- Resource requests/limits configured for homelab
- Multi-source ArgoCD application pattern
- TLS certificates via cert-manager (Let's Encrypt)
- Metrics and Trivy scanning enabled

Components:
- Portal, Core, Registry, JobService (1 replica each)
- Embedded PostgreSQL and Redis
- NGINX reverse proxy
- Trivy vulnerability scanner
- Prometheus metrics exporter

Refs: /mnt/mk-labs-pka/tony-stark-inbox/harbor-phase1-deployment.md

cluster/platform/the-seas/certificate.yaml

@@ -0,0 +1,16 @@
+# ------------------------------------------------------------------------------
+# Certificate — The Seas TLS Certificate
+# Primary DNS: the-seas.local.mk-labs.cloud
+# ------------------------------------------------------------------------------
+apiVersion: cert-manager.io/v1
+kind: Certificate
+metadata:
+  name: the-seas-tls
+  namespace: the-seas
+spec:
+  secretName: the-seas-tls
+  issuerRef:
+    name: letsencrypt-prod
+    kind: ClusterIssuer
+  dnsNames:
+    - the-seas.local.mk-labs.cloud