feat: agent token, auth.agent middleware, /mcp route with HadoServer skeleton

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01BCrwHHnGCB5XH968Nxokqw

core/routes/ai.php

@@ -0,0 +1,7 @@
+<?php
+
+use App\Mcp\HadoServer;
+use Laravel\Mcp\Facades\Mcp;
+
+// Вход агента (§11): без сессии и CSRF (маршрут вне группы web), мимо forward_auth хаба.
+Mcp::web('/mcp', HadoServer::class)->middleware(['auth.agent', 'throttle:60,1']);