feat(agents): Phase 7-10 API endpoints for hooks, plugins, skills, sessions

backend/app/routers/__init__.py

@@ -15,3 +15,8 @@ from app.routers.skill import router as skill_router
 from app.routers.log import router as log_router
 from app.routers.system import router as system_router
 from app.routers.brain import router as brain_router
+from app.routers.hooks import router as hooks_router
+from app.routers.plugins import router as plugins_router
+from app.routers.plugins import _marketplace_router as marketplace_router
+from app.routers.agent_skills import router as agent_skills_router
+from app.routers.agent_sessions import router as agent_sessions_router