convert class Interval to record

[asolntsev]

No description provided.

[what-the-diff]

PR Summary

• Modification in SqlTransformer.java
  The SqlTransformer.java file underwent changes for a better and efficient code structure.

• Refactoring of Interval class
  We transformed the private static class Interval into a private record Interval. This new structure now includes an add method enhancing its functionality.

• Removal of getStart and getEnd Methods from Interval Record
  The getStart and getEnd methods were removed from the Interval record, streamlining its offerings.

• Update on Method Calls
  The code has been updated to use start and end method calls, replacing the previous getStart and getEnd methods. This offers a more straightforward way of getting interval boundaries.

These changes make the code more efficient and maintainable, improving the overall application performance.

[kingthorin]

I haven't really done any work with records yet. This is a nice simplification.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 91.75%. Comparing base (413b707) to head (df332cd).
Report is 3 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff              @@
##               main    #1333      +/-   ##
============================================
- Coverage     91.87%   91.75%   -0.12%     
+ Complexity     3159     3155       -4     
============================================
  Files           316      316              
  Lines          6237     6232       -5     
  Branches        634      634              
============================================
- Hits           5730     5718      -12     
- Misses          351      354       +3     
- Partials        156      160       +4     

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