Initial commit: Laravel scaffold + Common Crawl site indexing

Adds Site/SitePage models and the crawlindex:fetch command, which pulls
CDX index records from Common Crawl and optionally enriches them with
page title/description/keywords/body text extracted from the WARC
archive. CDX/WARC access and the site/page upsert logic live in
CommonCrawlIndexService and WarcRecordFetcher.

bootstrap/app.php

@@ -0,0 +1,21 @@
+<?php
+
+use Illuminate\Foundation\Application;
+use Illuminate\Foundation\Configuration\Exceptions;
+use Illuminate\Foundation\Configuration\Middleware;
+use Illuminate\Http\Request;
+
+return Application::configure(basePath: dirname(__DIR__))
+    ->withRouting(
+        web: __DIR__.'/../routes/web.php',
+        commands: __DIR__.'/../routes/console.php',
+        health: '/up',
+    )
+    ->withMiddleware(function (Middleware $middleware): void {
+        //
+    })
+    ->withExceptions(function (Exceptions $exceptions): void {
+        $exceptions->shouldRenderJsonWhen(
+            fn (Request $request) => $request->is('api/*'),
+        );
+    })->create();

bootstrap/cache/.gitignore

@@ -0,0 +1,2 @@
+*
+!.gitignore

bootstrap/providers.php

@@ -0,0 +1,7 @@
+<?php
+
+use App\Providers\AppServiceProvider;
+
+return [
+    AppServiceProvider::class,
+];