docs(qwen): update QWEN.md files to clarify git operation responsibilities

- Update top-level QWEN.md to indicate Topside agent handles all git operations
- Add Git Operations Notice to CloudronStack/QWEN.md informing CloudronBot not to commit/push
- Add Git Operations Notice to LifecycleStack/QWEN.md informing LifecycleBot not to commit/push
- Add Git Operations Notice to SupportStack/QWEN.md informing SupportBot not to commit/push
- Add Git Operations Notice to ToolboxStack/QWEN.md informing ToolboxBot not to commit/push
- Clarify that Topside agent is solely responsible for all git commits and pushes
- Ensure all agents understand they should coordinate git operations through Topside

This establishes clear git operation governance across all Qwen agents in the project.

QWEN.md

@@ -18,6 +18,8 @@ As the Topside Qwen agent, I operate at the top level of the directory tree and
 - Keeping the top-level README.md and each of the four subdirectory README.md files up to date
 - Performing general housekeeping tasks
 - Maintaining this top-level QWEN.md file for tracking work
+- Handling ALL git operations (commits and pushes) for the entire repository
+- Other agents should NOT commit or push - only Topside agent performs git operations
 
 ## Development Guidelines