drop laravel scaffold defaults

removed app/Models/User.php (laravel auth model - tide authors a
ddd User entity in app/User/), app/Http/Controllers/Controller.php
(controllers live flat in app/Controllers/ per youngstartup), and
all three 0001_01_01_* migrations (default users schema, cache,
jobs - tide writes its own users migration with is_admin and
password_hash). routes/api.php stripped of the sanctum-bound
/user demo route - left as an empty stub for incoming domains.

backend/routes/api.php

@@ -1,8 +1,6 @@
 <?php
 
-use Illuminate\Http\Request;
-use Illuminate\Support\Facades\Route;
-
-Route::get('/user', function (Request $request) {
-    return $request->user();
-})->middleware('auth:sanctum');
+// Route registrations land here as the auth, user, post, and comment
+// domains come online. Empty for now - the skeleton commit only wires
+// up the file so bootstrap/app.php's withRouting(api: ...) has a valid
+// target.