Don't emit JMS event on file upload until the associated Media is saved

[whikloj]

What steps does it take to reproduce the issue?

Configure an Islandora instance with Fedora, when you upload a file to the media (but before you save the media) look in the Alpaca logs for an exception.

When does this issue occur?

File is selected on the media page, it is uploaded in the background.

Which page does it occur on?

The media edit page (can't remember the URL)

What happens?

Exception in Alpaca

To whom does it occur (anonymous visitor, editor, administrator)?

Someone creating a media and adding a file to it. So authorized user.

What did you expect to happen?

No exception thrown

Which version of Islandora are you using?

Current

Any related open or closed issues to this bug report?

https://github.com/Islandora/isle-dc/issues/258

This was discussed at the May 25, 2022 Open tech call and it was suggested that Islandora should not emit a file event until the actual media is saved.

[ruebot]

This probably explains a bunch of my exceptions.