chore: rename cameleer3 to cameleer

Rename Java packages from com.cameleer3 to com.cameleer, module
directories from cameleer3-* to cameleer-*, and all references
throughout workflows, Dockerfiles, docs, migrations, and pom.xml.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

deploy/base/server.yaml

@@ -1,16 +1,16 @@
 apiVersion: apps/v1
 kind: Deployment
 metadata:
-  name: cameleer3-server
+  name: cameleer-server
 spec:
   replicas: 1
   selector:
     matchLabels:
-      app: cameleer3-server
+      app: cameleer-server
   template:
     metadata:
       labels:
-        app: cameleer3-server
+        app: cameleer-server
     spec:
       imagePullSecrets:
         - name: gitea-registry
@@ -19,7 +19,7 @@ spec:
         runAsUser: 1000
       containers:
         - name: server
-          image: gitea.siegeln.net/cameleer/cameleer3-server:latest
+          image: gitea.siegeln.net/cameleer/cameleer-server:latest
           ports:
             - containerPort: 8081
           env:
@@ -110,11 +110,11 @@ spec:
 apiVersion: v1
 kind: Service
 metadata:
-  name: cameleer3-server
+  name: cameleer-server
 spec:
   type: ClusterIP
   selector:
-    app: cameleer3-server
+    app: cameleer-server
   ports:
     - port: 8081
       targetPort: 8081