log to scuba number of newly uploaded changesets to Commit Cloud

Summary:
log to scuba number of newly uploaded changesets to Commit Cloud

this would be helpful for debugging issues and improve our general understanding of how much new
commits are coming to commit cloud and from what clients

Reviewed By: markbt

Differential Revision:
D41306999

LaMa Project: L1122763

fbshipit-source-id: e5b1ce29b1ee358b1780b7e6b18a6ee6b838b8b1

Author: Liubov Dmitrieva

eden/scm/edenscm/edenapi_upload.py

@@ -135,6 +135,10 @@ def _uploadchangesets(repo, changesets, mutations):
                     uploaded.append(cs[0])
                 else:
                     failed.append(cs[0])
+
+            repo.ui.log(
+                "edenapi_uploaded_changesets", edenapi_uploaded_changesets=len(uploaded)
+            )
             return uploaded, failed
     except (error.RustError, error.HttpError) as e:
         raise error.Abort(e)