test: setup common stability and robustness properties tracking

lib/volume/vwap/Vwap.Quantower.Tests.cs

@@ -189,4 +189,4 @@ public class VwapIndicatorTests
         // All values after reset should be similar (since price is constant)
         Assert.True(valuesAtReset.Count >= 2, "Should have multiple reset points");
     }
-}
+}

lib/volume/vwap/Vwap.Tests.cs

@@ -426,4 +426,4 @@ public class VwapTests
             Assert.Equal(batchResult.Values[i], streamingResults[i], 10);
         }
     }
-}
+}

lib/volume/vwap/Vwap.Validation.Tests.cs

@@ -258,4 +258,4 @@ public class VwapValidationTests
         double expectedTypicalPrice = (30.0 + 10.0 + 20.0) / 3.0;
         Assert.Equal(expectedTypicalPrice, result.Value, 10);
     }
-}
+}