feat(agent): Agent Files / agent Cloud storage — api backend (ENG-589) (#37172)

Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Co-authored-by: autofix-ci[bot] <114827586+autofix-ci[bot]@users.noreply.github.com>

api/controllers/inner_api/__init__.py

@@ -17,12 +17,14 @@ inner_api_ns = Namespace("inner_api", description="Internal API operations", pat
 
 from . import mail as _mail
 from .app import dsl as _app_dsl
+from .plugin import agent_drive as _agent_drive
 from .plugin import plugin as _plugin
 from .workspace import workspace as _workspace
 
 api.add_namespace(inner_api_ns)
 
 __all__ = [
+    "_agent_drive",
     "_app_dsl",
     "_mail",
     "_plugin",