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>

.planning/phases/03-agent-registry-sse-push/03-02-SUMMARY.md

@@ -24,14 +24,14 @@ tech-stack:
 
 key-files:
   created:
-    - cameleer3-server-app/src/main/java/com/cameleer3/server/app/agent/SseConnectionManager.java
-    - cameleer3-server-app/src/main/java/com/cameleer3/server/app/controller/AgentSseController.java
-    - cameleer3-server-app/src/main/java/com/cameleer3/server/app/controller/AgentCommandController.java
-    - cameleer3-server-app/src/test/java/com/cameleer3/server/app/controller/AgentSseControllerIT.java
-    - cameleer3-server-app/src/test/java/com/cameleer3/server/app/controller/AgentCommandControllerIT.java
+    - cameleer-server-app/src/main/java/com/cameleer/server/app/agent/SseConnectionManager.java
+    - cameleer-server-app/src/main/java/com/cameleer/server/app/controller/AgentSseController.java
+    - cameleer-server-app/src/main/java/com/cameleer/server/app/controller/AgentCommandController.java
+    - cameleer-server-app/src/test/java/com/cameleer/server/app/controller/AgentSseControllerIT.java
+    - cameleer-server-app/src/test/java/com/cameleer/server/app/controller/AgentCommandControllerIT.java
   modified:
-    - cameleer3-server-app/src/main/java/com/cameleer3/server/app/config/WebConfig.java
-    - cameleer3-server-app/src/test/resources/application-test.yml
+    - cameleer-server-app/src/main/java/com/cameleer/server/app/config/WebConfig.java
+    - cameleer-server-app/src/test/resources/application-test.yml
 
 key-decisions:
   - "SSE events path excluded from ProtocolVersionInterceptor for EventSource client compatibility"