chore: load paginated versions of workflow

api/db/workflow_client.py

@@ -300,10 +300,18 @@ class WorkflowClient(BaseDBClient):
     async def get_workflow_versions(
         self,
         workflow_id: int,
+        limit: int | None = None,
+        offset: int = 0,
     ) -> list[WorkflowDefinitionModel]:
-        """List all versions for a workflow, newest first."""
+        """List versions for a workflow, newest first.
+
+        When `limit` is provided, returns at most `limit` rows starting from
+        `offset` — used by the version history panel to page through long
+        histories without dragging the full `workflow_json` payload for every
+        version on every open.
+        """
         async with self.async_session() as session:
-            result = await session.execute(
+            query = (
                 select(WorkflowDefinitionModel)
                 .where(
                     WorkflowDefinitionModel.workflow_id == workflow_id,
@@ -313,6 +321,11 @@ class WorkflowClient(BaseDBClient):
                 )
                 .order_by(WorkflowDefinitionModel.version_number.desc())
             )
+            if offset:
+                query = query.offset(offset)
+            if limit is not None:
+                query = query.limit(limit)
+            result = await session.execute(query)
             return result.scalars().all()
 
     async def get_all_workflows(

api/routes/workflow.py

@@ -703,9 +703,15 @@ async def get_workflow(
 @router.get("/{workflow_id}/versions")
 async def get_workflow_versions(
     workflow_id: int,
+    limit: int | None = Query(None, ge=1, le=100),
+    offset: int = Query(0, ge=0),
     user: UserModel = Depends(get_user),
 ) -> list[WorkflowVersionResponse]:
-    """List all versions for a workflow, newest first."""
+    """List versions for a workflow, newest first.
+
+    Pass `limit`/`offset` to page through long histories. With no `limit`,
+    returns every version (legacy behavior).
+    """
     workflow = await db_client.get_workflow(
         workflow_id, organization_id=user.selected_organization_id
     )
@@ -714,7 +720,9 @@ async def get_workflow_versions(
             status_code=404, detail=f"Workflow with id {workflow_id} not found"
         )
 
-    versions = await db_client.get_workflow_versions(workflow_id)
+    versions = await db_client.get_workflow_versions(
+        workflow_id, limit=limit, offset=offset
+    )
     return [
         WorkflowVersionResponse(
             id=v.id,

api/tests/test_pipeline_cancellation.py

@@ -47,7 +47,7 @@ class BusyWaitProcessor(FrameProcessor):
 
 @pytest.mark.asyncio
 async def test_interruption_with_blocked_end_frame():
-    busy_wait_processor = BusyWaitProcessor(wait_time=0.5)
+    busy_wait_processor = BusyWaitProcessor(wait_time=5.0)
     transport = MockTransport()
     pipeline = Pipeline([transport, busy_wait_processor])
 
@@ -84,8 +84,6 @@ async def test_interruption_with_blocked_end_frame():
     )
 
     # If there are pending tasks, we timed out
-    # FIXME: Currently I have creaetd an issue on pipecat which talks about
-    # how this behaviour is not good. https://github.com/pipecat-ai/pipecat/issues/4412
     if pending:
         # Cancel all pending tasks
         for t in pending: