tjson: Fix schema comparison

[rumyantseva]

Description

This PR closes #907.

This implementation offers recursive calls of schema.Equal instead of reflect.DeepEqual.

Schemas are considered equal if:

• for arrays: Items' schemas are equal
• for objects: the keys are the same, and their schemas are equal
• for scalars: their types and formats are equal

Readiness checklist

• I added tests for new functionality or bugfixes.
• I ran task all, and it passed.
• I added/updated comments for both exported and unexported top-level declarations (functions, types, etc).
• I checked comments rendering with task godocs.
• (for maintainers only) I set Reviewers, Assignee, Labels, Project and project's Sprint fields.
• I marked all done items in this checklist.

[codecov]

Codecov Report

Merging #944 (7c6c160) into main (024cf92) will increase coverage by 0.11%.
The diff coverage is 77.08%.

@@            Coverage Diff             @@
##             main     #944      +/-   ##
==========================================
+ Coverage   61.94%   62.05%   +0.11%     
==========================================
  Files         228      228              
  Lines       10610    10657      +47     
==========================================
+ Hits         6572     6613      +41     
- Misses       3259     3262       +3     
- Partials      779      782       +3     

Impacted Files	Coverage Δ
internal/tjson/schema.go	63.41% <77.08%> (+14.73%)	⬆️
internal/util/version/version.go	55.00% <0.00%> (-5.00%)	⬇️
internal/handlers/pg/pgdb/collections.go	60.17% <0.00%> (+2.65%)	⬆️

Flag	Coverage Δ
integration	56.39% <0.00%> (-0.28%)	⬇️
mongodb	18.59% <ø> (-0.06%)	⬇️
pg	61.57% <ø> (-0.04%)	⬇️
tigris	18.06% <0.00%> (-0.11%)	⬇️
unit	25.01% <77.08%> (+0.28%)	⬆️

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[w84thesun]

Overall looks good, got a small question about test.