[code health] rename cont to ok

[michaelneuder]

📝 Summary

Replace cont local with ok to be more idomatic.

---

✅ I have run these commands

• make lint
• make test-race
• go mod tidy
• I have seen and agree to CONTRIBUTING.md

[codecov-commenter]

Codecov Report

Merging #497 (566a202) into main (bcc805c) will not change coverage.
The diff coverage is 50.00%.

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@@           Coverage Diff           @@
##             main     #497   +/-   ##
=======================================
  Coverage   31.40%   31.40%           
=======================================
  Files          24       24           
  Lines        4853     4853           
=======================================
  Hits         1524     1524           
  Misses       3136     3136           
  Partials      193      193           

Flag	Coverage Δ
unittests	31.40% <50.00%> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

Files Changed	Coverage Δ
services/api/service.go	37.08% <50.00%> (ø)

[metachris]

Thx