Postgres - adding in schema support

[jaredwray]

Please check if the PR fulfills these requirements

• Followed the Contributing guidelines.
• Tests for the changes have been added (for bug fixes/features) with 100% code coverage.
• Docs have been added / updated (for bug fixes / features)

What kind of change does this PR introduce? (Bug fix, feature, docs update, ...)
Postgres - adding in schema support

[codecov]

Codecov Report

Patch coverage: 100.00% and no project coverage change.

Comparison is base (4591836) 100.00% compared to head (1c60611) 100.00%.

Additional details and impacted files

@@            Coverage Diff            @@
##              main      #731   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           21        21           
  Lines         2401      2408    +7     
  Branches        95        95           
=========================================
+ Hits          2401      2408    +7     

Impacted Files	Coverage Δ
packages/postgres/src/index.js	100.00% <100.00%> (ø)

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