fix: proper introspection output format

[aeneasr]

Related issue(s)

Checklist

• I have read the contributing guidelines.
• I have referenced an issue containing the design document if my change
  introduces a new feature.
• I am following the
  contributing code guidelines.
• I have read the security policy.
• I confirm that this pull request does not address a security
  vulnerability. If this pull request addresses a security vulnerability, I
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• I have added tests that prove my fix is effective or that my feature
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Further Comments

[codecov]

Codecov Report

Merging #3312 (ca72439) into master (71226bc) will decrease coverage by 0.06%.
The diff coverage is 0.00%.

@@            Coverage Diff             @@
##           master    #3312      +/-   ##
==========================================
- Coverage   76.90%   76.84%   -0.07%     
==========================================
  Files         123      123              
  Lines        8907     8912       +5     
==========================================
- Hits         6850     6848       -2     
- Misses       1630     1636       +6     
- Partials      427      428       +1     

Impacted Files	Coverage Δ
cmd/output_introspection.go	9.09% <0.00%> (-6.30%)	⬇️
persistence/sql/persister_oauth2.go	82.12% <0.00%> (-0.77%)	⬇️
health/doc.go	0.00% <0.00%> (ø)

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