Upsert ArvanCloud DNS records when a super-admin adds or updates a domain.

Tenant zones get an apex ANAME and CNAMEs for www, business, customer, and api without storing origin IPs.

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

src/arvan-dns/arvan-dns.module.ts

@@ -0,0 +1,8 @@
+import { Module } from '@nestjs/common';
+import { ArvanDnsService } from './arvan-dns.service';
+
+@Module({
+  providers: [ArvanDnsService],
+  exports: [ArvanDnsService],
+})
+export class ArvanDnsModule {}