Azure Upload Progress Hotfix

[rickalee]

Add transient for file uploads to track the progress of offloading to Azure when wp_generate_attachment_metadata runs. Ensure PDF generated thumbnails are offloaded with JPEG mime type instead of PDF.

Description of the Change

Alternate Designs

Benefits

Possible Drawbacks

Verification Process

Checklist:

• I have read the CONTRIBUTING document.
• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have added tests to cover my change.
• All new and existing tests passed.

Applicable Issues

Changelog Entry

[jeffpaul]

@moraleida waiting on your confirmation from testing, please keep us posted, thanks!

[moraleida]

@jeffpaul @rickalee this was tested on preprod last week. It did indeed reduce the server load when uploading hundreds of images but something doesn't seem correct about the numbers (percentages and totals) reported in the admin. We'll need to test a bit more to make sure we don't break that.

[rickalee]

@moraleida I believe you are correct. I will work on fix to add original_image to count if source is larger than 2560.

[jeffpaul]

@rickalee we can close this in favor of #110, correct?

[rickalee]

@jeffpaul Yes. #110 includes these changes.