Remove boxed null guards from generated logarithmic conversions

[Copilot]

LogarithmicScalesGenerator was still emitting ArgumentNullException.ThrowIfNull(linear) for linear inputs that are now readonly record struct quantities. That null check is unreachable and forces boxing on every conversion call in the generated logarithmic APIs.

• Generator emission

  • Removed the null-guard emission from LogarithmicScalesGenerator for From* logarithmic conversion methods.

• Regenerated logarithmic outputs

  • Regenerated affected files so each From* conversion no longer includes the boxed null check:
    • Cents, Decibels (both FromGain and FromPowerRatio), DirectionalityIndex, PH, Semitones, SoundIntensityLevel, SoundPowerLevel, SoundPressureLevel.

• Allocation regression guard

  • Extended QuantityValueTypeTests to assert zero allocation for a logarithmic conversion path (Decibels.FromGain), closing the coverage gap that allowed this drift.

public static Decibels<T> FromGain(Gain<T> linear)
{
    double linearValue = double.CreateChecked(linear.Value);
    return new(T.CreateChecked(20.0 * Math.Log10(linearValue)));
}

• Fixes Generated logarithmic conversions still null-check a parameter that is now a value type, boxing on every call #217

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud