Fix legacy RC hosting orders not appearing after app extraction.

Import RC service orders in hosting:import, map platform_id on legacy models, and wire legacy order manage links to hosting.legacy.show.

Co-authored-by: Cursor <cursoragent@cursor.com>

database/migrations/2026_06_06_220000_add_platform_id_to_rc_service_orders_table.php

@@ -0,0 +1,26 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    public function up(): void
+    {
+        if (Schema::hasTable('rc_service_orders') && ! Schema::hasColumn('rc_service_orders', 'platform_id')) {
+            Schema::table('rc_service_orders', function (Blueprint $table): void {
+                $table->unsignedBigInteger('platform_id')->nullable()->unique()->after('id');
+            });
+        }
+    }
+
+    public function down(): void
+    {
+        if (Schema::hasTable('rc_service_orders') && Schema::hasColumn('rc_service_orders', 'platform_id')) {
+            Schema::table('rc_service_orders', function (Blueprint $table): void {
+                $table->dropColumn('platform_id');
+            });
+        }
+    }
+};