Definitely needs to be a Feature request. The Run ID is good, we know it's a notebook and therefore it should be the Notebook name not just the word "Notebook"

Also this dbutils.notebook.getContext.currentRunId

Is yielding a different number, when print out on success!

dbutils.notebook.exit(s"${notebook} #${dbutils.notebook.getContext.currentRunId} : success")

• Notebook job #7890 - giving
• MyNotebookName #Some(RunId(8188)) : success