Revert "feat!: remove obsolete Cocoa option EnableWatchdogTerminationTracking"

This reverts commit e2efaea. The option still exists in sentry-cocoa,
so #4643 is not planned.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

Author: jamescrosswell

src/Sentry/Platforms/Cocoa/BindableSentryOptions.cs

@@ -21,6 +21,7 @@ public class NativeOptions
         public bool? EnableMemoryIntrospection { get; set; }
         public bool? EnableNetworkBreadcrumbs { get; set; }
         public bool? EnableNetworkTracking { get; set; }
+        public bool? EnableWatchdogTerminationTracking { get; set; }
         public bool? EnableSwizzling { get; set; }
         public bool? EnableUIViewControllerTracing { get; set; }
         public bool? EnableUserInteractionTracing { get; set; }
@@ -41,6 +42,9 @@ public void ApplyTo(SentryOptions.NativeOptions options)
             options.EnableMemoryIntrospection = EnableMemoryIntrospection ?? options.EnableMemoryIntrospection;
             options.EnableNetworkBreadcrumbs = EnableNetworkBreadcrumbs ?? options.EnableNetworkBreadcrumbs;
             options.EnableNetworkTracking = EnableNetworkTracking ?? options.EnableNetworkTracking;
+#pragma warning disable CS0618 // Type or member is obsolete
+            options.EnableWatchdogTerminationTracking = EnableWatchdogTerminationTracking ?? options.EnableWatchdogTerminationTracking;
+#pragma warning restore CS0618 // Type or member is obsolete
             options.EnableSwizzling = EnableSwizzling ?? options.EnableSwizzling;
             options.EnableUIViewControllerTracing = EnableUIViewControllerTracing ?? options.EnableUIViewControllerTracing;
             options.EnableUserInteractionTracing = EnableUserInteractionTracing ?? options.EnableUserInteractionTracing;

src/Sentry/Platforms/Cocoa/SentryOptions.cs

@@ -140,6 +140,18 @@ internal NativeOptions(SentryOptions options)
         /// </remarks>
         public bool EnableNetworkTracking { get; set; } = true;
 
+        /// <summary>
+        /// Whether to enable watchdog termination tracking or not. NOT advised.
+        /// The default value is <c>false</c> (disabled).
+        /// </summary>
+        /// <remarks>
+        /// This feature is prone to false positives on .NET since it relies on heuristics that don't work in this environment.
+        /// </remarks>
+        /// <seealso href="https://github.com/getsentry/sentry-dotnet/issues/3860" />
+        /// <seealso href="https://docs.sentry.io/platforms/apple/configuration/watchdog-terminations/" />
+        [Obsolete("See: https://github.com/getsentry/sentry-dotnet/issues/3860")]
+        public bool EnableWatchdogTerminationTracking { get; set; } = false;
+
         /// <summary>
         /// Whether the SDK should use swizzling or not.
         /// The default value is <c>true</c> (enabled).

src/Sentry/Platforms/Cocoa/SentrySdk.cs

@@ -143,8 +143,9 @@ private static void InitSentryCocoaSdk(SentryOptions options)
         nativeOptions.EnableMemoryIntrospection = options.Native.EnableMemoryIntrospection;
         nativeOptions.EnableNetworkBreadcrumbs = options.Native.EnableNetworkBreadcrumbs;
         nativeOptions.EnableNetworkTracking = options.Native.EnableNetworkTracking;
-        // Prone to false positives on .NET, see https://github.com/getsentry/sentry-dotnet/issues/3860
-        nativeOptions.EnableWatchdogTerminationTracking = false;
+#pragma warning disable CS0618 // Type or member is obsolete
+        nativeOptions.EnableWatchdogTerminationTracking = options.Native.EnableWatchdogTerminationTracking;
+#pragma warning restore CS0618 // Type or member is obsolete
         nativeOptions.EnableSwizzling = options.Native.EnableSwizzling;
         nativeOptions.EnableUIViewControllerTracing = options.Native.EnableUIViewControllerTracing;
         nativeOptions.EnableUserInteractionTracing = options.Native.EnableUserInteractionTracing;