add company and users table migrations

backend/migrations/2025_11_10_073400_create_companies_table.php

@@ -17,7 +17,7 @@ return new class extends Migration
             $table->string('label')->nullable()->default('null')->comment('公司名 中文');
             $table->boolean('enabled')->default('true')->comment('激活状态');
             $table->text('ext')->default('null')->comment('额外信息');
-            $table->datetimes();
+            $table->timestampsTz();
         });
     }