[Approximation Framework] Extending approximation to top-level term queries on numeric fields

[sawansri]

Description

Enables approximation in top level term queries on numeric fields by wrapping termQuery mappers in NumberFieldMapper with ApproximatePointRangeQuery instead of Lucene's newExactQuery

Related Issues

Resolves #18620

Check List

• Functionality includes testing.
• API changes companion pull request created, if applicable.
• Public documentation issue/PR created, if applicable.

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[sawansri]

I'm waiting on #18530 to get merged before rebasing and refactoring my tests to integrate with the parameterized versions in ApproximatePointRangeQueryTests.

[github-actions]

❌ Gradle check result for e8e55c4: FAILURE

Please examine the workflow log, locate, and copy-paste the failure(s) below, then iterate to green. Is the failure a flaky test unrelated to your change?

[github-actions]

❌ Gradle check result for ce6db1c: FAILURE

Please examine the workflow log, locate, and copy-paste the failure(s) below, then iterate to green. Is the failure a flaky test unrelated to your change?

[github-actions]

✅ Gradle check result for 6582d5e: SUCCESS

[codecov]

Codecov Report

Attention: Patch coverage is 62.50000% with 24 lines in your changes missing coverage. Please review.

Project coverage is 72.84%. Comparing base (5d9695c) to head (067933a).

Files with missing lines	Patch %	Lines
...org/opensearch/index/mapper/NumberFieldMapper.java	62.50%	12 Missing and 12 partials ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##               main   #18679      +/-   ##
============================================
+ Coverage     72.74%   72.84%   +0.10%     
- Complexity    68400    68475      +75     
============================================
  Files          5568     5568              
  Lines        314401   314429      +28     
  Branches      45598    45604       +6     
============================================
+ Hits         228696   229034     +338     
+ Misses        67055    66779     -276     
+ Partials      18650    18616      -34     

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[github-actions]

✅ Gradle check result for 067933a: SUCCESS