test: setup common stability and robustness properties tracking

lib/cycles/cg/Cg.Quantower.Tests.cs

@@ -338,4 +338,4 @@ public class CgIndicatorTests
         double cgValue = indicator.LinesSeries[0].GetValue(0);
         Assert.True(cgValue < 0, $"Downtrend should produce negative CG, got {cgValue}");
     }
-}
+}

lib/cycles/cg/Cg.Tests.cs

@@ -755,4 +755,4 @@ public class CgTests
     }
 
     #endregion
-}
+}

lib/cycles/cg/Cg.Validation.Tests.cs

@@ -378,4 +378,4 @@ public class CgValidationTests
         int finiteCount = values.Count(v => double.IsFinite(v));
         Assert.True(finiteCount > 100, $"Expected >100 finite values, got {finiteCount}");
     }
-}
+}