feat: emit events in identity persister

[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
  confirm that I got the approval (please contact
  [email protected]) 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

Attention: Patch coverage is 92.30769% with 2 lines in your changes missing coverage. Please review.

Project coverage is 78.49%. Comparing base (7d6a458) to head (912a49a).
Report is 6 commits behind head on master.

Files with missing lines	Patch %	Lines
persistence/sql/identity/persister_identity.go	88.88%	1 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #4107      +/-   ##
==========================================
+ Coverage   78.48%   78.49%   +0.01%     
==========================================
  Files         376      376              
  Lines       26755    26771      +16     
==========================================
+ Hits        20998    21014      +16     
+ Misses       4155     4154       -1     
- Partials     1602     1603       +1     

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