feat: Add support for converting dy.Struct to postgres JSONB

[AndreasAlbertQC]

Motivation

I want to store structs.

Changes

• Added conversion of struct columns to JSONB in postgres

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.00%. Comparing base (b5819ed) to head (4bffa3a).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff            @@
##              main      #257   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           53        53           
  Lines         3080      3086    +6     
=========================================
+ Hits          3080      3086    +6     

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