Improve command logging and `log_err` module paths (#39674)

Prior we only logged the crate in `log_err`, which is not too helpful.
We now assemble the module path from the file system path.

Release Notes:

- N/A *or* Added/Fixed/Improved ...
9a5034ea6dLukas Wirth committed on 10/7/2025, 12:11:15 PM· committed by GitHubparent64eec67
10 files changedLine totals unavailable