fix(ember): Guard routerService.recognize() against unrecognizable URLs

[aklkv]

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instrumentEmberAppInstanceForPerformance calls routerService.recognize(url) at three sites without guarding it.

recognize() throws for URLs the router cannot resolve. Most notably it asserts:

Assertion Failed: You must pass a url that begins with the application's rootURL "/"

whenever the URL is not prefixed with the app's rootURL — which is the case under Ember's none location, the one @ember/test-helpers installs. Since the first call happens inside browserTracingIntegration's afterAllSetup, the assertion propagates out of integration setup and takes down every acceptance test that boots the app.

Reproducing it needs nothing exotic — an app that calls instrumentAppInstancePerformance(appInstance) and has any acceptance test using visit() will hit it. Host apps currently have to work around it by skipping instrumentation under test entirely, which also costs them tracing coverage in tests.

The fix

All three call sites are already written for a missing routeInfo:

name: routeInfo ? `route:${routeInfo.name}` : /* …URL fallback… */   // pageload span
_getRouteUrlAttributes(client, url, routeInfo?.params)               // routeWillChange
routeInfo?.params ?? transition.to?.params                           // routeDidChange

The only thing missing is that recognize() throws instead of returning undefined. This routes the three sites through a small _recognizeURL() helper that catches and degrades to undefined, matching the intent the surrounding code already expresses. No intended behavior changes — a URL the router can resolve behaves exactly as before.

Notes

• Follows the existing _getLocationURL convention in this module (// Only exported for testing).
• Return type is derived as ReturnType<RouterService['recognize']> | undefined, so no new imports.
• Tests are appended to tests/instrument-router-location.test.ts, which already covers this module: recognized URL passes through, the rootURL assertion yields undefined, and any other throw yields undefined.
• Happy to add a DEBUG_BUILD-gated debug log in the catch if you'd prefer the failure be visible rather than silent — left it out to keep the change minimal.

Affects the v2 addon introduced in #23252; still present on develop and in 11.0.0-beta.1.