Cantaloupe server error - image ingest

[rmjaffe]

Describe the bug

When investigating the cause of #651, Ryan found another example of a broken image, from the Universal Viewer loading a 799px image. As noted on #651, "These images can be found in the Cantaloupe cached images folders, so I believe this is an intermittent error in Cantaloupe."

Expected behavior

Display images should appear on the work display pages in full -- no white rectangles.

Acceptance criteria

Done means:

• Images are processing / derivatives created correctly

Related work

#651
#652

[rmjaffe]

In reviewing the board, #515 seems to have roots in this same issue.