chore: repo cleanup and code quality improvements

- Remove global.json (SDK pinning unnecessary)

- Remove nuget.config, move MyGet source to .csproj RestoreAdditionalProjectSources

- Gitignore ndepend/ entirely, move badges to docs/img/

- Update README.md and docs/ndepend.md badge paths

- Add NDepend project property to QuanTAlib.slnx

- Expand .editorconfig ReSharper/diagnostic suppressions

- Use ArgumentOutOfRangeException instead of ArgumentException

- Use discard _ for unused event sender parameters

- Remove quantalib.code-workspace and sonar-suppressions.json

- Add filter signature SVGs

lib/volume/vf/Vf.Validation.Tests.cs

@@ -110,7 +110,7 @@ public class VfValidationTests
         vfHigh.Update(bar2High, isNew: true);
 
         // Higher volume should produce larger absolute VF
-        Assert.True(System.Math.Abs(vfHigh.Last.Value) > System.Math.Abs(vfLow.Last.Value),
+        Assert.True(Math.Abs(vfHigh.Last.Value) > Math.Abs(vfLow.Last.Value),
             $"High volume VF ({vfHigh.Last.Value}) should exceed low volume VF ({vfLow.Last.Value})");
     }
 

lib/volume/vf/Vf.cs

@@ -36,16 +36,10 @@ public sealed class Vf : ITValuePublisher
     private State _ps;
     private readonly int _period;
     private readonly double _alpha;
-
-    /// <inheritdoc/>
     public TValue Last { get; private set; }
-    /// <inheritdoc/>
     public bool IsHot => _s.Index >= _period;
-    /// <inheritdoc/>
     public int WarmupPeriod => _period;
-    /// <inheritdoc/>
     public string Name { get; }
-    /// <inheritdoc/>
     public event TValuePublishedHandler? Pub;
 
     /// <summary>