Implement runtime type checking against ELM result types and report type drift.

[antvaset]

• Add the EnableTypeChecking engine option (disabled by default). When type checking is enabled, the dynamic runtime value types are checked against the static result types from the ELM. Mismatches are logged as warnings and can help debug and diagnose the drift.
• So far, I found potential issues in the Power, DifferenceBetween, DurationBetween, CalculateAge, CalculateAgeAt operators, which may have been already reported.

[github-actions]

Formatting check succeeded!

[codecov]

Codecov Report

❌ Patch coverage is 69.44444% with 33 lines in your changes missing coverage. Please review.
✅ Project coverage is 65.91%. Comparing base (a14a3d9) to head (6eaed71).

Files with missing lines	Patch %	Lines
...rg/opencds/cqf/cql/engine/execution/TypeChecker.kt	68.62%	21 Missing and 11 partials ⚠️
...ncds/cqf/cql/engine/execution/EvaluationVisitor.kt	66.66%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##             master    #1673      +/-   ##
============================================
+ Coverage     65.89%   65.91%   +0.01%     
  Complexity     1645     1645              
============================================
  Files           478      479       +1     
  Lines         27641    27748     +107     
  Branches       5497     5529      +32     
============================================
+ Hits          18215    18289      +74     
- Misses         7098     7119      +21     
- Partials       2328     2340      +12     

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[sonarqubecloud]

Quality Gate failed

Failed conditions
79.2% Coverage on New Code (required ≥ 80%)

See analysis details on SonarQube Cloud