fix: strip public from schema

[aeneasr]

Closes #3367

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
  confirm that I got the approval (please contact
  security@ory.sh) from the maintainers to push
  the changes.
• I have added tests that prove my fix is effective or that my feature
  works.
• I have added or changed the documentation.

Further Comments

[codecov]

Codecov Report

Merging #3374 (e77eb46) into master (4ee4456) will decrease coverage by 0.04%.
The diff coverage is n/a.

❗ Current head e77eb46 differs from pull request most recent head 205fc64. Consider uploading reports for the commit 205fc64 to get more accurate results

@@            Coverage Diff             @@
##           master    #3374      +/-   ##
==========================================
- Coverage   76.95%   76.90%   -0.05%     
==========================================
  Files         123      123              
  Lines        8964     8964              
==========================================
- Hits         6898     6894       -4     
- Misses       1639     1643       +4     
  Partials      427      427              

Impacted Files	Coverage Δ
persistence/sql/persister_oauth2.go	81.36% <0.00%> (-1.53%)	⬇️

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