- Add OPCAuthz module with fine-grained access control
- Users can only view/modify tasks they created or are assigned to
- Admins have full access to all resources
- Members can trigger PM agent, only admins can trigger CTO/COO
- Only admins can approve CxO-level agent executions
- Track task creator in metadata for authorization
- Add metadata column with default '{}' to tasks table
- Filter task and execution lists based on user permissions
- Add 10 integration tests for authorization logic