feat(routes,email): persist system DNS routes with runtime hydration and add reusable email ops DNS helpers

ts/email/classes.email-domain.manager.ts

@@ -6,6 +6,7 @@ import { DomainDoc } from '../db/documents/classes.domain.doc.js';
 import { DnsRecordDoc } from '../db/documents/classes.dns-record.doc.js';
 import type { DnsManager } from '../dns/manager.dns.js';
 import type { IEmailDomain, IEmailDnsRecord, TDnsRecordStatus } from '../../ts_interfaces/data/email-domain.js';
+import { buildEmailDnsRecords } from './email-dns-records.js';
 
 /**
  * EmailDomainManager — orchestrates email domain setup.
@@ -181,34 +182,13 @@ export class EmailDomainManager {
       }
     }
 
-    const records: IEmailDnsRecord[] = [
-      {
-        type: 'MX',
-        name: domain,
-        value: `10 ${hostname}`,
-        status: doc.dnsStatus.mx,
-      },
-      {
-        type: 'TXT',
-        name: domain,
-        value: 'v=spf1 a mx ~all',
-        status: doc.dnsStatus.spf,
-      },
-      {
-        type: 'TXT',
-        name: `${selector}._domainkey.${domain}`,
-        value: dkimValue,
-        status: doc.dnsStatus.dkim,
-      },
-      {
-        type: 'TXT',
-        name: `_dmarc.${domain}`,
-        value: `v=DMARC1; p=none; rua=mailto:dmarc@${domain}`,
-        status: doc.dnsStatus.dmarc,
-      },
-    ];
-
-    return records;
+    return buildEmailDnsRecords({
+      domain,
+      hostname,
+      selector,
+      dkimValue,
+      statuses: doc.dnsStatus,
+    });
   }
 
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