fix(mock): update payloads and test for struct changes

[ecrupper]

At some point it might be a good idea to do the same testing for the listings, but I figured I'd get feedback on this first.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (b5207c4) 67.30% compared to head (be9ecc7) 62.31%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1060      +/-   ##
==========================================
- Coverage   67.30%   62.31%   -5.00%     
==========================================
  Files         330      345      +15     
  Lines        9470    10229     +759     
==========================================
  Hits         6374     6374              
- Misses       2622     3381     +759     
  Partials      474      474              

Files	Coverage Δ
mock/server/build.go	0.00% <ø> (ø)
mock/server/deployment.go	0.00% <ø> (ø)
mock/server/hook.go	0.00% <ø> (ø)
mock/server/repo.go	0.00% <ø> (ø)
mock/server/schedule.go	0.00% <ø> (ø)
mock/server/secret.go	0.00% <ø> (ø)
mock/server/service.go	0.00% <ø> (ø)
mock/server/step.go	0.00% <ø> (ø)
mock/server/worker.go	0.00% <ø> (ø)

... and 6 files with indirect coverage changes