feat: Refactor Error Handling

[thomaspoignant]

Refactor Error Handling

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 133 lines in your changes missing coverage. Please review.

Project coverage is 0.00%. Comparing base (b128e16) to head (efd2191).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
dao/postgres_impl.go	0.00%	58 Missing ⚠️
handler/flags.go	0.00%	57 Missing ⚠️
dao/err/postgres_error_wrapper.go	0.00%	9 Missing ⚠️
dao/err/dao_error.go	0.00%	7 Missing ⚠️
api/server.go	0.00%	1 Missing ⚠️
main.go	0.00%	1 Missing ⚠️

Additional details and impacted files

@@          Coverage Diff           @@
##            main      #6    +/-   ##
======================================
  Coverage   0.00%   0.00%            
======================================
  Files         10      12     +2     
  Lines        548     692   +144     
======================================
- Misses       548     692   +144     

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