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]>

platform/crafty/kustomization.yaml

@@ -0,0 +1,25 @@
+---
+# Crafty Controller — Minecraft management panel, web UI Keycloak-gated by a per-pod oauth2-proxy
+# reverse-proxy sidecar (Option B). Rendered by its OWN post-platform Flux Kustomization
+# (clusters/base/crafty.yaml, dependsOn platform-config, wait:false) — NOT by the gating `platform`
+# tier: a leaf UI whose pod can be legitimately unhealthy must never gate the platform chain
+# (DECISIONS-LOG: "Headlamp gating stall"). Same non-gating pattern as headlamp/homepage/oauth2-proxy.
+#
+# The Gateway API CRs (httproute) + LoadBalancer Services travel WITH the component here: the CRDs they
+# need (gateway.networking.k8s.io, cilium.io) are registered by `platform`, and `platform` is Ready
+# before this tier's platform-config dependency completes, so ordering holds.
+apiVersion: kustomize.config.k8s.io/v1beta1
+kind: Kustomization
+resources:
+  - namespace.yaml
+  - pvc.yaml
+  - deployment.yaml
+  - service.yaml
+  # oauth2-proxy sidecar client + cookie secrets — SOPS-encrypted, decrypted per-env by the crafty
+  # Kustomization (clusters/dev patches it by name). Referenced by name only (R-IDP-04).
+  - crafty-oauth2-proxy-credentials.sops.yaml
+  # default-deny baseline + Cilium ingress(gateway/game)/egress(world) allows.
+  - networkpolicy.yaml
+  # web-UI ingress (crafty.home -> oauth2-proxy sidecar) + game-port L4 LoadBalancer (VIP .55).
+  - httproute.yaml
+  - service-l4.yaml