Fix subdomain DNS messaging for Ladill nameservers and retire pending-setup primaries.

Treat ns_auto domains as managed DNS, publish subdomain A records via PowerDNS without failing the UX when the local DNS registry is missing, and promote real linked domains over pending-setup.local placeholders.

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

database/migrations/2026_07_13_164500_create_domain_dns_records_table.php

@@ -0,0 +1,39 @@
+<?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('domain_dns_records')) {
+            return;
+        }
+
+        Schema::create('domain_dns_records', function (Blueprint $table) {
+            $table->id();
+            $table->foreignId('domain_id')->constrained('domains')->cascadeOnDelete();
+            $table->string('name');
+            $table->string('type', 20);
+            $table->text('value');
+            $table->unsignedInteger('ttl')->default(3600);
+            $table->unsignedSmallInteger('priority')->nullable();
+            $table->string('source')->default('managed');
+            $table->string('status')->default('pending');
+            $table->timestamp('last_checked_at')->nullable();
+            $table->text('notes')->nullable();
+            $table->timestamps();
+
+            $table->index(['domain_id', 'source']);
+            $table->index(['domain_id', 'status']);
+            $table->unique(['domain_id', 'name', 'type', 'value'], 'domain_dns_records_unique');
+        });
+    }
+
+    public function down(): void
+    {
+        Schema::dropIfExists('domain_dns_records');
+    }
+};