feat(schedule): implement multiple schedule providers

gallery/easel/depends/schedule.py

@@ -0,0 +1,9 @@
+from typing import Annotated
+
+from fastapi import Depends
+
+from gallery.sketch.schedule.api import ScheduleApi
+
+from .api import api_resolver
+
+ScheduleApiDepends = Annotated[ScheduleApi, Depends(api_resolver(ScheduleApi))]