Allow tolerance for comparing float scores

[alonre24]

Describe the changes in the pull request

Mark if applicable

• This PR introduces API changes
• This PR introduces serialization changes

[Copilot]

Pull Request Overview

This PR introduces a tolerance threshold for comparing float scores in query results.

• Introduces an EPSILON constant for tolerance
• Implements a helper function (double_eq) utilizing the tolerance
• Updates the comparator function to use the new tolerance-based equality check

Comments suppressed due to low confidence (2)

src/VecSim/utils/query_result_utils.h:14

• [nitpick] Consider renaming EPSILON to a more descriptive name (e.g., QUERY_RESULT_EPSILON) to clarify its purpose.

#define EPSILON (1e-6)

src/VecSim/utils/query_result_utils.h:16

• [nitpick] Consider renaming the function 'double_eq' to a more expressive name like 'nearlyEqual' to better indicate its purpose for tolerance-based comparison.

inline bool double_eq(double a, double b) { return fabs(a - b) < EPSILON; }

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 96.65%. Comparing base (ca1137a) to head (a1a30db).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #694   +/-   ##
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  Coverage   96.65%   96.65%           
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  Files         121      121           
  Lines        6756     6757    +1     
=======================================
+ Hits         6530     6531    +1     
  Misses        226      226           

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