test: setup common stability and robustness properties tracking

lib/volume/pvo/Pvo.Quantower.Tests.cs

@@ -234,4 +234,4 @@ public class PvoIndicatorTests
         Assert.True(double.IsFinite(val1));
         Assert.True(double.IsFinite(val2));
     }
-}
+}

lib/volume/pvo/Pvo.Tests.cs

@@ -517,4 +517,4 @@ public class PvoTests
         // After warmup with constant volume, PVO should be very close to 0
         Assert.True(Math.Abs(pvo.Last.Value) < 0.01, $"PVO should be ~0 with constant volume, but was {pvo.Last.Value}");
     }
-}
+}

lib/volume/pvo/Pvo.Validation.Tests.cs

@@ -245,4 +245,4 @@ public class PvoValidationTests
         int finiteCount = values.Count(v => double.IsFinite(v));
         Assert.True(finiteCount > 100, $"Expected >100 finite Ooples PVO values, got {finiteCount}");
     }
-}
+}