feat(core): Track NavigationContainer adoption (#6424)

* feat(core): Track GlobalErrorBoundary adoption

Register a no-op `GlobalErrorBoundary` integration when the
component mounts so the name flows through to
`event.sdk.integrations` — the same channel used for feature-
adoption signals like `MobileFeedback` and `AppStart`.

Also introduces a shared `registerFeatureMarker` helper.
Subsequent markers for other opt-in features
(NavigationContainer, ExpoRouter error boundary, AppLoaded, ...)
will use this helper — see #6415.

Refs: #6415

* feat(core): Track NavigationContainer adoption

Register a no-op `NavigationContainer` integration when the
component mounts so the name flows through to
`event.sdk.integrations`.

Refs: #6415

Author: antonis

packages/core/src/js/NavigationContainer.tsx

@@ -3,6 +3,9 @@ import * as React from 'react';
 
 import { getNavigationContainerComponent } from './reactNavigationImport';
 import { getReactNavigationIntegration } from './tracing/reactnavigation';
+import { registerFeatureMarker } from './utils/featureMarkers';
+
+export const NAVIGATION_CONTAINER_INTEGRATION_NAME = 'NavigationContainer';
 
 export type FontStyle = {
   fontFamily: string;
@@ -124,6 +127,10 @@ export const NavigationContainer = React.forwardRef<unknown, SentryNavigationCon
     [forwardedRef],
   );
 
+  React.useEffect(() => {
+    registerFeatureMarker(NAVIGATION_CONTAINER_INTEGRATION_NAME);
+  }, []);
+
   const onReady = React.useCallback(() => {
     try {
       const client = getClient();

packages/core/test/NavigationContainer.test.tsx

@@ -2,10 +2,12 @@ import { render } from '@testing-library/react-native';
 import * as React from 'react';
 import { Text, View } from 'react-native';
 
-import { NavigationContainer } from '../src/js/NavigationContainer';
+import { NAVIGATION_CONTAINER_INTEGRATION_NAME, NavigationContainer } from '../src/js/NavigationContainer';
 
 const mockRegisterNavigationContainer = jest.fn();
 const mockGetClient = jest.fn();
+const mockAddIntegration = jest.fn();
+const mockGetIntegrationByName = jest.fn();
 const mockDebugLog = jest.fn();
 const mockDebugWarn = jest.fn();
 
@@ -47,12 +49,25 @@ jest.mock('../src/js/reactNavigationImport', () => ({
 describe('NavigationContainer', () => {
   beforeEach(() => {
     jest.clearAllMocks();
-    mockGetClient.mockReturnValue({ getIntegrationByName: jest.fn() });
+    mockGetIntegrationByName.mockReturnValue(undefined);
+    mockGetClient.mockReturnValue({
+      getIntegrationByName: mockGetIntegrationByName,
+      addIntegration: mockAddIntegration,
+    });
     mockGetReactNavigationIntegration.mockReturnValue({
       registerNavigationContainer: mockRegisterNavigationContainer,
     });
   });
 
+  it('registers the NavigationContainer feature marker on mount', () => {
+    render(
+      <NavigationContainer>
+        <Text>App</Text>
+      </NavigationContainer>,
+    );
+    expect(mockAddIntegration).toHaveBeenCalledWith({ name: NAVIGATION_CONTAINER_INTEGRATION_NAME });
+  });
+
   it('renders children through to the underlying NavigationContainer', () => {
     const { getByText } = render(
       <NavigationContainer>