Add directory to send, etc. errors

[reidsunderland]

Closes #1098. Sorry to steal this from @mshak2, i was trying to debug errors on dev and it was super hard without this.

Creating as a draft, because I need to make sure the flow tests pass.

[github-actions]

Test Results

242 tests   234 ✅  19s ⏱️
  1 suites    8 💤
  1 files      0 ❌

Results for commit d21fe2e.

♻️ This comment has been updated with latest results.

[petersilva]

I'm wondering if we should make these messages more verbose... as in list both source and destination, and username and host... my original thinking in not having this was that it is all available on other lines in the log, and so I would just use the grep to find the error and use either vi or grep -B10 -A10 to get the other information. But I see it's a lot easier to get everything we need if a straight grep will do it... so maybe the error messages should be a lot more explicit. not sure...

[reidsunderland]

I think that would be great, have all the information in one place. It would make troubleshooting a lot easier.

Especially with batching, the lines immediately above and below don't always have the needed information.