Support passing additional params with file save/upload POST request and expose those in beforeSaveFile/afterSaveFile

[evtimDev]

New Feature / Enhancement Checklist

• I am not disclosing a vulnerability.
• I am not just asking a question.
• I have searched through existing issues.

Current Limitation

No official support.

Feature / Enhancement Description

This is the server-side feature request to support the relevant functionality of the client SDK feature requests:
parse-community/Parse-SDK-Android#1201
parse-community/Parse-SDK-iOS-OSX#1766

Example Use Case

See linked client sdk bugs

Alternatives / Workarounds

Custom schemes to pass additional params via headers, or mimicking the JS SDK behavior and recoding the file into a json format with additional metadata/tags. See linked client sdk bugs for details

3rd Party References

[parse-github-assistant]

Thanks for opening this issue!

• 🎉 We are excited about your ideas for improvement!