feat(astrolabe): add unified search provider with clickable file links

Integrate semantic search into Nextcloud's unified search UI. File results now use fileId parameter to properly open files instead of just navigating to the Files app.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

third_party/astroglobe/lib/AppInfo/Application.php

@@ -4,6 +4,7 @@ declare(strict_types=1);
 
 namespace OCA\Astroglobe\AppInfo;
 
+use OCA\Astroglobe\Search\SemanticSearchProvider;
 use OCP\AppFramework\App;
 use OCP\AppFramework\Bootstrap\IBootContext;
 use OCP\AppFramework\Bootstrap\IBootstrap;
@@ -18,6 +19,8 @@ class Application extends App implements IBootstrap {
 	}
 
 	public function register(IRegistrationContext $context): void {
+		// Register unified search provider for semantic search
+		$context->registerSearchProvider(SemanticSearchProvider::class);
 	}
 
 	public function boot(IBootContext $context): void {