런타임 계약과 학습자 흐름 보강

apps/api/app/routes/admin.py

@@ -14,6 +14,7 @@ from pydantic import BaseModel, Field
 from ..auth_types import AccountStatus, RoleName
 from ..auth_sessions import (
     ManagedUserPatch,
+    ManagedUserUpsertInput,
     active_session_count,
     deactivate_managed_user,
     get_managed_user,
@@ -24,6 +25,7 @@ from ..auth_sessions import (
     upsert_managed_user,
 )
 from ..config import settings
+from ..contracts.engine_gateway import ENGINE_GATEWAY_DEFAULT_MODEL_SENTINEL
 from ..db import acquire, get_pool, healthcheck
 from ..deps import Principal, require_admin_access
 from ..engine_client import engine_client
@@ -955,7 +957,7 @@ def _default_engine_config() -> AdminEngineConfigResponse:
     return AdminEngineConfigResponse(
         engine_mode=settings.engine_mode,
         engine_url=settings.engine_url,
-        model="gateway-default",
+        model=ENGINE_GATEWAY_DEFAULT_MODEL_SENTINEL,
         durable=False,
         source="runtime_default",
     )
@@ -1725,14 +1727,16 @@ async def create_user(
     if body.role == "admin" or body.admin_access:
         _assert_super_admin(principal)
     user = await upsert_managed_user(
-        email=_normalize_email(body.email),
-        display_name=body.display_name,
-        role=body.role,
-        admin_access=body.admin_access,
-        account_status=body.account_status,
-        affiliation=body.affiliation,
-        cohort_ids=body.cohort_ids,
-        reactivate=True,
+        ManagedUserUpsertInput(
+            email=_normalize_email(body.email),
+            display_name=body.display_name,
+            role=body.role,
+            admin_access=body.admin_access,
+            account_status=body.account_status,
+            affiliation=body.affiliation,
+            cohort_ids=body.cohort_ids,
+            reactivate=True,
+        )
     )
     users, durable = await list_managed_users()
     if not durable: