tests: add @Covers annotations to the service-wiring tests

The three service-wiring construction tests lacked @Covers
annotations, so MediaWiki's generated PHPUnit config (which sets
forceCoversAnnotation) flagged them as risky. Annotate each test
method with the class it exercises through the extension's service
wiring: BootstrapComponentsService, ComponentLibrary, and
NestingController.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Author: malberts

tests/phpunit/Unit/ServiceWiringTest.php

@@ -22,20 +22,29 @@
 class ServiceWiringTest extends TestCase {
 
 
+	/**
+	 * @covers  \MediaWiki\Extension\BootstrapComponents\BootstrapComponentsService
+	 */
 	public function testCanConstructBootstrapComponentsService()	{
 		$this->assertInstanceOf(
 			BootstrapComponentsService::class,
 			MediaWikiServices::getInstance()->getService('BootstrapComponentsService')
 		);
 	}
 
+	/**
+	 * @covers  \MediaWiki\Extension\BootstrapComponents\ComponentLibrary
+	 */
 	public function testCanConstructComponentLibrary()	{
 		$this->assertInstanceOf(
 			ComponentLibrary::class,
 			MediaWikiServices::getInstance()->getService('BootstrapComponents.ComponentLibrary')
 		);
 	}
 
+	/**
+	 * @covers  \MediaWiki\Extension\BootstrapComponents\NestingController
+	 */
 	public function testCanConstructNestingController()	{
 		$this->assertInstanceOf(
 			NestingController::class,