feat(int): adding internal scheduler placeholder

.github/workflows/playwright.yml

@@ -15,7 +15,7 @@ env:
 
 jobs:
   end-to-end:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-latest
     services:
       postgres:
         image: postgres

src/dispatch/case/scheduled_internal.py

@@ -0,0 +1,2 @@
+def schedule_placeholder():
+    pass

src/dispatch/cli.py

@@ -641,6 +641,7 @@ def dispatch_scheduler():
     """Container for all dispatch scheduler commands."""
     # we need scheduled tasks to be imported
     from .case.scheduled import case_close_reminder, case_triage_reminder  # noqa
+    from .case.scheduled_internal import schedule_placeholder  # noqa
     from .case_cost.scheduled import (
         calculate_cases_response_cost,  # noqa
     )