ensure we don't send repeat messages to external systems on workflow recovery

This makes VLASS sad.

shared/workspaces/test/test_workflow_info.py

@@ -25,6 +25,7 @@ from workspaces.workflow.schema import (
     WorkflowTemplate,
     ProcessingSite,
     Controller,
+    WorkflowProgress,
 )
 from workspaces.workflow.services.interfaces import WorkflowInfoIF
 
@@ -57,6 +58,9 @@ class FakeWorkflowInfo(WorkflowInfoIF):
         else:
             return NotImplementedError
 
+    def lookup_workflow_stage(self, request_id: int, stage: str) -> Union[WorkflowProgress, None]:
+        return NotImplementedError
+
     def all_processing_sites(self) -> List[ProcessingSite]:
         return [self.lookup_processing_site("NAASC")]