Cover jsinspector-modern/tracing:profile with Stable API guards (#57977)

Summary:
Pull Request resolved: #57977

Classifies `jsinspector-modern/tracing:profile` as a private target under the three-tier C++ stable API visibility model. Consumers that opt into `RN_STRICT_API` now get an error if they include its headers directly; without that flag the guard is inert, so no existing build changes behaviour.

Changelog: [Internal]

Reviewed By: cipolleschi

Differential Revision: D116294338

Author: j-piasecki

packages/react-native/ReactCommon/jsinspector-modern/tracing/ProfileTreeNode.h

@@ -7,6 +7,8 @@
 
 #pragma once
 
+#include <react/cxxstableapi/PrivateGuard.h>
+
 #include <utility>
 
 #include <jsinspector-modern/tracing/RuntimeSamplingProfile.h>

packages/react-native/ReactCommon/jsinspector-modern/tracing/React-jsinspectortracing.podspec

@@ -44,6 +44,7 @@ Pod::Spec.new do |s|
   resolve_use_frameworks(s, header_mappings_dir: "../..", module_name: module_name)
 
   add_dependency(s, "React-jsinspectornetwork", :framework_name => 'jsinspector_modernnetwork')
+  s.dependency "React-cxxstableapi"
   s.dependency "React-jsi"
   s.dependency "React-oscompat"
   s.dependency "React-timing"

packages/react-native/ReactCommon/jsinspector-modern/tracing/TraceEventProfile.h

@@ -7,6 +7,8 @@
 
 #pragma once
 
+#include <react/cxxstableapi/PrivateGuard.h>
+
 #include <react/timing/primitives.h>
 
 #include <optional>