CRUD API calls for scheduler

[Igoranze]

Adding CRUD api calls for scheduler, as mentioned here:
#1104

[sentry]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 79.31%. Comparing base (eee770b) to head (cfefd31).
⚠️ Report is 22 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1214      +/-   ##
==========================================
- Coverage   79.58%   79.31%   -0.27%     
==========================================
  Files         272      273       +1     
  Lines       13196    13351     +155     
  Branches     1295     1311      +16     
==========================================
+ Hits        10502    10590      +88     
- Misses       2414     2480      +66     
- Partials      280      281       +1     

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[codspeed-hq]

CodSpeed Performance Report

Merging #1214 will not alter performance

_{Comparing crud-api-schedules (cfefd31) with main (4f98b5b)}

Summary

✅ 13 untouched