fix(mudcraft): set voice_host so clients connect to correct UDP endpoint

Simple Voice Chat was advertising a blank voice_host, causing clients to
try connecting to the pod's internal IP over UDP. Explicitly set
voice_host=mudcraft.nook.family:24454 via ConfigMap + initContainer.

servers/legion/k8s/mudcraft/statefulset.yaml

@@ -17,7 +17,7 @@ spec:
       labels:
         app: mudcraft
       annotations:
-        kubectl.kubernetes.io/restartedAt: "2026-03-30T02:45:00Z"
+        kubectl.kubernetes.io/restartedAt: "2026-03-30T03:00:00Z"
     spec:
       terminationGracePeriodSeconds: 120
       securityContext:
@@ -48,6 +48,8 @@ spec:
               sed "s|\${LP_PASSWORD}|${LP_PASSWORD}|g" /luckperms-config/config.yml > /target/LuckPerms/config.yml
               mkdir -p /target/PurpurExtras
               cp /purpurextras-config/config.yml /target/PurpurExtras/config.yml
+              mkdir -p /target/voicechat
+              cp /voicechat-config/voicechat-server.properties /target/voicechat/voicechat-server.properties
               echo 'Plugins installed'
           volumeMounts:
             - name: plugins
@@ -56,6 +58,8 @@ spec:
               mountPath: /luckperms-config
             - name: purpurextras-config
               mountPath: /purpurextras-config
+            - name: voicechat-config
+              mountPath: /voicechat-config
       containers:
         - name: mudcraft
           image: itzg/minecraft-server:java21
@@ -139,3 +143,6 @@ spec:
         - name: luckperms-config
           configMap:
             name: mudcraft-luckperms
+        - name: voicechat-config
+          configMap:
+            name: mudcraft-voicechat