Specify payloads too large failure cause

Author: jmaeagle99

temporalio/worker/_workflow.py

@@ -23,6 +23,7 @@
 import temporalio.converter
 import temporalio.exceptions
 import temporalio.workflow
+from temporalio.api.enums.v1 import WorkflowTaskFailedCause
 from temporalio.bridge.worker import PollShutdownError
 
 from . import _command_aware_visitor
@@ -385,8 +386,9 @@ async def _handle_activation(
             )
             completion.failed.Clear()
             await data_converter.encode_failure(err, completion.failed.failure)
-            # TODO: Add WORKFLOW_TASK_FAILED_CAUSE_PAYLOADS_TOO_LARGE to API
-            # completion.failed.force_cause = WorkflowTaskFailedCause.WORKFLOW_TASK_FAILED_CAUSE_PAYLOADS_TOO_LARGE
+            completion.failed.force_cause = (
+                WorkflowTaskFailedCause.WORKFLOW_TASK_FAILED_CAUSE_PAYLOADS_TOO_LARGE
+            )
         except Exception as err:
             logger.exception(
                 "Failed encoding completion on workflow with run ID %s", act.run_id