chore: implement review comments

api/services/quota_service.py

@@ -27,8 +27,8 @@ MINIMUM_DOGRAH_CREDITS_FOR_CALL = 0.10
 
 OSS_QUOTA_EXCEEDED_MESSAGE = (
     "You have exhausted your trial credits. "
-    "Please email founders@dograh.com for additional Dograh credits "
-    "or change providers in Models configurations."
+    "Please sign up on app.dograh.com to create a "
+    "new service key and set up in your model configurations."
 )
 
 HOSTED_QUOTA_EXCEEDED_MESSAGE = (

api/services/workflow/audit.py

@@ -1,9 +1,8 @@
 """Rule-based audit of a workflow definition's nodes + edges.
 
 Pure, dependency-free helpers derived from `NodeSpec.graph_constraints`.
-Lives in tracked code so the regression tests in
-`test_workflow_graph_constraints.py` can pin it; admin cleanup scripts
-under `api/services/admin_utils/` are the production consumers.
+Lives in tracked code so `test_workflow_graph_constraints.py` can pin the
+verdicts that one-off cleanup tooling needs to share with runtime validation.
 """
 
 from collections import Counter

api/tests/test_workflow_graph_constraints.py

@@ -9,9 +9,9 @@ category of violation we found in production. We pin two layers:
      layer ever stops rejecting one of these fixtures, the production
      write paths will quietly start accepting bad workflows again.
   2. audit_definition (api.services.workflow.audit) — read-only sweep
-     over persisted rows used by the admin cleanup script to find
+     over persisted rows for one-off cleanup tooling that finds
      legacy/imported breakage. Pinned so refactors of the rule set
-     don't silently change the verdicts the migration relies on.
+     don't silently change those cleanup verdicts.
 
 DTO-level shape validation is covered by `test_dto.py` and isn't
 re-pinned here.