Replace dev/schema.sql with Laravel migrations in the backend

Baseline migration reproduces the production dump byte-for-byte (verified via
mariadb-dump diff); creates are hasTable-guarded so prod only records it.
Drop stock Laravel migrations that contradict prod and Sanctum's bundled one.

think-backend.greaterchiangmai.com/app/Providers/AppServiceProvider.php

@@ -3,6 +3,7 @@
 namespace App\Providers;
 
 use Illuminate\Support\ServiceProvider;
+use Laravel\Sanctum\Sanctum;
 
 class AppServiceProvider extends ServiceProvider
 {
@@ -11,7 +12,8 @@ class AppServiceProvider extends ServiceProvider
      */
     public function register(): void
     {
-        //
+        // Sanctum tokens are unused (only the stock /api/user route); prod has no personal_access_tokens table.
+        Sanctum::ignoreMigrations();
     }
 
     /**