benchmark

0c8a0f68 - Add start event metadata to collected metadata for PT2 Compile Events

Add start event metadata to collected metadata for PT2 Compile Events Summary: X-link: https://github.com/pytorch/pytorch/pull/139289 We should be logging metadata from event starts to PT2 Compile Events too. ghstack-source-id: 250444771 Reviewed By: oulgen Differential Revision: D65070086 fbshipit-source-id: 63b934bff4254871e15a615e5aa47112b032b143