Move attachment_gw app under backend/attachment_gw/

[pashiav]

Fixes #6624

This PR reorganizes the project structure by moving the attachment_gw app into a new backend/attachment_gw/ directory under specifyweb/.

Summary of Changes:

• Moved attachment_gw to specifyweb/backend/attachment_gw/
• Updated all import paths to reflect the new location
• Updated SPECIFY_APPS in settings.py to include specifyweb.backend.attachment_gw

This is the 3rd PR in a broader backend reorganization. No frontend behavior or functionality was changed.

Notes:

• This PR requires a rebuild for the changes to take effect properly.
• This PR is built on Move permissions app under backend/permissions/ #6618.

Checklist

• Self-review the PR after opening it to make sure the changes look good and
  self-explanatory (or properly documented)
• Add relevant issue to release milestone
• Add pr to documentation list
• Add automated tests
• Add a reverse migration if a migration is present in the PR

Testing instructions

Please cross check the following functionalities with main.

• General Attachment testing (additional gen testing in addition to the ones below)

  Verify that you can:

  Record Attachments:

  • Upload/Add different types of attachments to a record (e.g. video, audio, image, presentation, documents)
  • Open an attachment in a new tab
  • Delete an attachment
  • Download an attachment through the Attachments popup
  • Download All attachments through the Attachments popup

  Batch Image Upload:

  • Add several different attachments (e.g. video, audio, image, presentation, documents)
  • Use this image (from v7.11 checklist) to pick 3 paths to upload to:
  
  • Validate data set
  • Upload data set
  • Use links to view records & verify that images are attached
  • Roll back data set
  • Interrupt upload after a bit and check that only some files were uploaded

  Workbench:

  • Import a valid dataset
  • Check correctness of imported dataset

[emenslin]

Testing instructions

Please cross check the following functionalities with main.

• General Attachment testing

  • Upload/Add different types of attachments to a record (e.g. video, audio, image, presentation, documents)
  • Open an attachment in a new tab
  • Delete an attachment
  • Download an attachment through the Attachments popup
  • Download All attachments through the Attachments popup

  Batch Image Upload:

  • Add several different attachments (e.g. video, audio, image, presentation, documents)
  • Use this image (from v7.11 checklist) to pick 3 paths to upload to:
  
  • Validate data set
  • Upload data set
  • Use links to view records & verify that images are attached
  • Roll back data set
  • Interrupt upload after a bit and check that only some files were uploaded

  Workbench:

  • Import a valid dataset
  • Check correctness of imported dataset

---

Looks good, the only thing I ran into is I'm having a bit of trouble loading large workbench datasets. In main the dataset is loading in just fine and I can scroll through all the rows without problems but in the issue branch it is having some problems. Could be unrelated and the dataset does eventually load in fine on the issue branch but it is something I wanted to make note of.

Issue branch:

07-02_10.20.mp4

Main:

07-02_10.21.mp4

[lexiclevenger]

Testing instructions

Please cross check the following functionalities with main.

• General Attachment testing (additional gen testing in addition to the ones below)

  • Upload/Add different types of attachments to a record (e.g. video, audio, image, presentation, documents)
  • Open an attachment in a new tab
  • Delete an attachment
  • Download an attachment through the Attachments popup
  • Download All attachments through the Attachments popup
  • Add several different attachments (e.g. video, audio, image, presentation, documents)
  • Use this image (from v7.11 checklist) to pick 3 paths to upload to:
  
  • Validate data set
  • Upload data set
  • Use links to view records & verify that images are attached
  • Roll back data set
  • Interrupt upload after a bit and check that only some files were uploaded
  • Import a valid dataset
  • Check correctness of imported dataset

---

Looks good! I didn't see any issues with attachments. I also didn't notice a difference in WB behaviors.