Refactor logging to use logrus in healthcheck, metrics, and token services

[t4niwa]

Description

description_with_details_and_reasoning

Assignees

• Assignees is set

Type of changes

• Apply one or more labels of the following that fits:
  • bug: Bug fix
  • dependencies: Dependency upgrades
  • documentation: Documentation changes
  • enhancement: New Feature
  • good first issue: First contribution
  • logging: Log changes
  • refactor: Refactoring (no functional changes, no api changes)

Flags

- [ ] Breaks backward compatibility
- [ ] Requires a documentation update
- [ ] Has untestable code

---

Checklist

- [ ] Followed the guidelines in the CONTRIBUTING document
- [ ] Added prefix `[skip ci]`/`[ci skip]`/`[no ci]`/`[skip actions]`/`[actions skip]` in the PR title if necessary
- [ ] Tested and linted the code
- [ ] Commented the code
- [ ] Made corresponding changes to the documentation

Checklist for maintainer

- [ ] Use `Squash and merge`
- [ ] Double-confirm the merge message has prefix `[skip ci]`/`[ci skip]`/`[no ci]`/`[skip actions]`/`[actions skip]`
- [ ] Delete the branch after merge

[codecov-commenter]

Codecov Report

❌ Patch coverage is 0% with 132 lines in your changes missing coverage. Please review.
✅ Project coverage is 9.79%. Comparing base (128fc50) to head (8b650ac).

Files with missing lines	Patch %	Lines
pkg/certificate/service.go	0.00%	54 Missing ⚠️
pkg/token/service.go	0.00%	32 Missing ⚠️
pkg/healthcheck/service.go	0.00%	12 Missing ⚠️
pkg/token/server.go	0.00%	12 Missing ⚠️
third_party/log/log.go	0.00%	12 Missing ⚠️
pkg/metrics/service.go	0.00%	10 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff            @@
##            main    #202      +/-   ##
========================================
+ Coverage   9.50%   9.79%   +0.29%     
========================================
  Files         34      34              
  Lines       3326    2613     -713     
========================================
- Hits         316     256      -60     
+ Misses      2988    2335     -653     
  Partials      22      22              

Flag	Coverage Δ
unittests	9.79% <0.00%> (+0.29%)	⬆️

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