Boundary integration into coder and policy enforcement

[evgeniy-scherbina]

Related doc: https://www.notion.so/coderhq/Agent-Boundary-Integration-The-Bypass-Problem-2e3d579be59280ce9e94f9560f0fea95

• think about org-level policy enforcement?
• enforce boundary usage via Bridge. Bridge can reject all requests which are not signed by Boundary.