REFACTOR(repo): simplify project structure

- Move services/backend to langgraph/
- Move deploy/docker/Dockerfile to Dockerfile
- Remove deploy/, services/ folders
- Update GitHub Actions workflow paths
- Remove kustomization update logic (managed by K3S-HOME/applications)

langgraph/agents/__init__.py

@@ -0,0 +1,19 @@
+"""
+MAS Agents Package
+K8s Infrastructure Planning System
+"""
+from .state import AgentState
+from .orchestrator import orchestrator_node
+from .planning_agent import planning_node
+from .research_agent import research_node
+from .decision_agent import decision_node
+from .prompt_generator_agent import prompt_generator_node
+
+__all__ = [
+    'AgentState',
+    'orchestrator_node',
+    'planning_node',
+    'research_node',
+    'decision_node',
+    'prompt_generator_node',
+]