Add validation to Job schedule to prevent scheduling jobs every second

[peterbppb]

No description provided.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 81.33%. Comparing base (1e0e706) to head (7967cdd).
Report is 4 commits behind head on develop.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop      #54      +/-   ##
===========================================
+ Coverage    80.94%   81.33%   +0.39%     
===========================================
  Files           16       17       +1     
  Lines          614      627      +13     
===========================================
+ Hits           497      510      +13     
  Misses         117      117              

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