feat: add ability to specify knex transaction config

[wschurman]

Why

Expo has a need for serializable transaction isolation level. This change allows specifying this configuration for knex.

How

Add transaction config, pass through (with translation particular to the adaptor flavor).

Test Plan

Run new tests.

[codecov]

Codecov Report

Merging #207 (8cc3719) into main (83fe9cd) will decrease coverage by 0.25%.
The diff coverage is 82.85%.

@@            Coverage Diff             @@
##             main     #207      +/-   ##
==========================================
- Coverage   96.18%   95.94%   -0.25%     
==========================================
  Files          81       81              
  Lines        2071     2094      +23     
  Branches      271      282      +11     
==========================================
+ Hits         1992     2009      +17     
  Misses         79       79              
- Partials        0        6       +6     

Flag	Coverage Δ
integration	95.94% <82.85%> (-0.25%)	⬇️
unittest	95.94% <82.85%> (-0.25%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
...ter-knex/src/PostgresEntityQueryContextProvider.ts	78.57% <71.42%> (-21.43%)	⬇️
...ample/src/adapters/InMemoryQueryContextProvider.ts	75.00% <100.00%> (ø)
packages/entity/src/EntityQueryContext.ts	97.05% <100.00%> (+0.23%)	⬆️
packages/entity/src/EntityQueryContextProvider.ts	100.00% <100.00%> (ø)
packages/entity/src/ViewerContext.ts	100.00% <100.00%> (ø)
...tity/src/utils/testing/StubQueryContextProvider.ts	100.00% <100.00%> (ø)

... and 2 files with indirect coverage changes

Help us with your feedback. Take ten seconds to tell us how you rate us. Have a feature suggestion? Share it here.

[wschurman]

I think I'm okay with codecov decrease since this is just a translation layer and typescript is sufficient to check that.