fix(calculation): probe JSON options stricter than the real spawn/reinit path (review)

CalculationDriverProbe.Opts (Test-Connect) omitted AllowTrailingCommas and
ReadCommentHandling that CalculationDriverFactoryExtensions.JsonOptions
(spawn) and CalculationDriver.ReinitJsonOptions (in-place ApplyDelta) both
set, so a config blob the real deploy path tolerates could fail Test-Connect
as "invalid JSON" even though deploying it would succeed. Aligned the three
option sets. Also adds CalculationDriverProbeTests.cs, which previously did
not exist at all for this driver type's Test-Connect surface.

Part of code-reviews/Driver.Calculation/findings.md (-003, -004).

src/Drivers/ZB.MOM.WW.OtOpcUa.Driver.Calculation/CalculationDriverProbe.cs

@@ -13,10 +13,16 @@ namespace ZB.MOM.WW.OtOpcUa.Driver.Calculation;
 /// </summary>
 public sealed class CalculationDriverProbe : IDriverProbe
 {
+    // Mirrors CalculationDriverFactoryExtensions.JsonOptions / CalculationDriver.ReinitJsonOptions
+    // (AllowTrailingCommas + ReadCommentHandling included) so a config blob the real spawn/reinit path
+    // tolerates never fails Test-Connect as "invalid JSON" — the probe must never be STRICTER than the
+    // path it is standing in for.
     private static readonly JsonSerializerOptions Opts = new()
     {
         PropertyNameCaseInsensitive = true,
         UnmappedMemberHandling = JsonUnmappedMemberHandling.Skip,
+        ReadCommentHandling = JsonCommentHandling.Skip,
+        AllowTrailingCommas = true,
         Converters = { new JsonStringEnumConverter() },
     };