fix(jit): raise validation error for required fields

[karatakis]

Summary:
Fix validation of required fields to cover edge cases for the JIT module

Remember to test it with cargo test --features force_jit

Build & Testing:

• I ran cargo test successfully.
• I have run ./lint.sh --mode=fix to fix all linting issues raised by ./lint.sh --mode=check.

Checklist:

• I have added relevant unit & integration tests.
• I have updated the documentation accordingly.
• I have performed a self-review of my code.
• PR follows the naming convention of <type>(<optional scope>): <title>

[karatakis]

Test case test-required-fields.md_5.snap needs discussion. I believe it should not fail, but the current implementation fails. This issue is open for discussion.

Edit: On second look and the tip from Meskill I think this point is invalid

[meskill]

Test case test-required-fields.md_5.snap needs discussion. I believe it should not fail, but the current implementation fails. This issue is open for discussion.

Why do you think it should not fail? You have non-null list of non-null values and one of the values is null - according to spec the parent value should be resolved to null in that case and that is against the schema

[karatakis]

Looking at it today, @meskill, I think it is okay. I messed up the normal tests with the JIT tests

[codecov]

Codecov Report

Attention: Patch coverage is 16.66667% with 15 lines in your changes missing coverage. Please review.

Project coverage is 86.17%. Comparing base (7be002f) to head (932d935).
Report is 1 commits behind head on main.

Files	Patch %	Lines
src/core/jit/synth/synth.rs	16.66%	15 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2754      +/-   ##
==========================================
- Coverage   86.21%   86.17%   -0.05%     
==========================================
  Files         255      255              
  Lines       25020    25030      +10     
==========================================
- Hits        21572    21570       -2     
- Misses       3448     3460      +12     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.