Onboard Crafty Controller (Minecraft panel) with Keycloak-gated web UI

Add Crafty Controller 4 (registry.gitlab.com/crafty-controller/crafty-4:4.10.8)
as a platform component: a web panel that runs Java + Bedrock Minecraft servers as
subprocesses in one pod + a 20Gi Longhorn PVC (mounted 5x by subPath).

Auth = Option B (per-app oauth2-proxy reverse-proxy sidecar), since Cilium 1.16.5
cannot do ext_authz on the shared Gateway:
- oauth2-proxy v7.8.1 sidecar (:4180) reverse-proxies to Crafty's self-signed HTTPS
  UI (127.0.0.1:8443), gated to Keycloak homelab realm group platform-admins.
- Confidential `crafty` client provisioned live via kcadm + captured in the realm
  import; client secret + cookie secret via SOPS/age (mirrored in realm-clients).

- Web UI: HTTPRoute crafty.home.keithjackson.dev -> Service :80 -> sidecar :4180.
- Game ports: Cilium L2 LoadBalancer on VIP 192.168.1.55 (next free after .53/.54),
  starter set TCP 25565-25567 (Java) + UDP 19132-19134 (Bedrock), NOT auth-gated.
- fsGroup:0 / runAsGroup:0 / runAsUser:1000 for the image's crafty:root identity on
  the root:root Longhorn PVC (the seerr fsGroup lesson).
- Own non-gating Flux tier clusters/base/crafty.yaml (dependsOn platform-config,
  wait:false) + sops-decryption patch in clusters/dev — a leaf UI must never gate
  the platform.
- Explicit default-deny NetworkPolicy + CiliumNetworkPolicies (platform namespace,
  not app-namespace, so Kyverno does not auto-generate the baseline).

make -C ci gate green; kustomize build of platform/crafty, clusters/base,
clusters/dev clean.

Co-Authored-By: Claude Opus 4.8 <[email protected]>

clusters/dev/kustomization.yaml

@@ -91,6 +91,20 @@ patches:
           provider: sops
           secretRef:
             name: sops-age
+  # crafty has its own post-platform Flux Kustomization (clusters/base/crafty.yaml). It carries
+  # crafty-oauth2-proxy-credentials.sops.yaml, so it needs its own SOPS decryption stanza (same as
+  # headlamp/oauth2-proxy). The `sops-age` Secret is created out-of-band (name only).
+  - patch: |-
+      apiVersion: kustomize.toolkit.fluxcd.io/v1
+      kind: Kustomization
+      metadata:
+        name: crafty
+        namespace: flux-system
+      spec:
+        decryption:
+          provider: sops
+          secretRef:
+            name: sops-age
   - patch: |-
       apiVersion: source.toolkit.fluxcd.io/v1
       kind: GitRepository