feat: add AI descriptions and platform submission checks

backend/app/main.py

@@ -53,6 +53,7 @@ from .schemas import (
     SessionOutput,
 )
 from .security import bootstrap, cipher, issue_session, require_auth, token_hash, valid_password
+from .submission import router as submission_router
 
 
 def account_output(account, client, settings):
@@ -486,4 +487,5 @@ def create_app(settings=None, wq_client=None, ai_model_factory=None):
     app.include_router(research_catalog_router)
     app.include_router(research_router)
     app.include_router(ai_router(ai_runtime))
+    app.include_router(submission_router(runner, ai_runtime))
     return app