Refactor JSON and SDK fields

[qwerty287]

deprecations from #3806 and #3228

[woodpecker-bot]

Deployment of preview was successful: https://woodpecker-ci-woodpecker-pr-3968.surge.sh

[codecov]

Codecov Report

Attention: Patch coverage is 40.00000% with 9 lines in your changes missing coverage. Please review.

Project coverage is 26.87%. Comparing base (c864f24) to head (66446fb).
Report is 1 commits behind head on main.

Files	Patch %	Lines
...e/datastore/migration/034_rename_start_end_time.go	40.00%	6 Missing and 3 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3968      +/-   ##
==========================================
- Coverage   26.88%   26.87%   -0.01%     
==========================================
  Files         395      396       +1     
  Lines       27473    27489      +16     
==========================================
+ Hits         7387     7389       +2     
- Misses      19387    19397      +10     
- Partials      699      703       +4     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.