Proposed changes

The SMS/WhatsApp integration isn't storing uploaded files, the current implementation is just storing the SMS media URL as a message attachment and this is the reason we aren't able to get the fileUpload data through the Apps-Engine because the file field is missing.
Now, the integration will store the media files properly, not just store the file but also link it to messages.

Issue(s)

How to test or reproduce

• Active the SMS integration
• Setup Twilio integration
• Send/Share files through WhatsApp
• The file will be stored properly

Screenshots

Types of changes

• Bugfix (non-breaking change which fixes an issue)
• Improvement (non-breaking change which improves a current function)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Hotfix (a major bugfix that has to be merged asap)
• Documentation Update (if none of the other choices apply)

Checklist

• I have read the CONTRIBUTING doc
• I have signed the CLA
• Lint and unit tests pass locally with my changes
• I have added tests that prove my fix is effective or that my feature works (if applicable)
• I have added necessary documentation (if applicable)
• Any dependent changes have been merged and published in downstream modules

Changelog

Further comments