chore(batch-exports): Add non-retryable postgres error (#25230)

posthog/temporal/batch_exports/postgres_batch_export.py

@@ -670,6 +670,8 @@ async def run(self, inputs: PostgresBatchExportInputs):
                 # A user added a unique constraint on their table, but batch exports (particularly events)
                 # can cause duplicates.
                 "UniqueViolation",
+                # Something changed in the target table's schema that we were not expecting.
+                "UndefinedColumn",
             ],
             finish_inputs=finish_inputs,
         )