Add MUDCraft Minecraft server infrastructure

- Purpur 1.21.4 server via itzg/docker-minecraft-server (java21)
- StatefulSet with 3 PVCs: worlds (20Gi), plugins (5Gi), logs (5Gi)
- Aikar G1GC JVM flags, 6GB heap (sized for Legion's 15GB RAM)
- Postgres: mudcraft database + user in existing platform/postgres
- RCON secret + DB password via ExternalSecret → Vault
- Traefik TCP entrypoint on port 25565 for mudcraft.nook.family
- mudcraft namespace via Terraform
- Argo CD app watching k8s/mudcraft/

servers/legion/k8s/mudcraft/service.yaml

@@ -0,0 +1,32 @@
+---
+# ClusterIP — Traefik TCP route targets this
+apiVersion: v1
+kind: Service
+metadata:
+  name: mudcraft
+  namespace: mudcraft
+spec:
+  selector:
+    app: mudcraft
+  ports:
+    - name: minecraft
+      port: 25565
+      targetPort: 25565
+      protocol: TCP
+  type: ClusterIP
+---
+# RCON — internal only, for server management
+apiVersion: v1
+kind: Service
+metadata:
+  name: mudcraft-rcon
+  namespace: mudcraft
+spec:
+  selector:
+    app: mudcraft
+  ports:
+    - name: rcon
+      port: 25575
+      targetPort: 25575
+      protocol: TCP
+  type: ClusterIP