feat(domains): support username root domain claims

scripts/migrate_delegated_dns.py

@@ -258,9 +258,9 @@ def apply_plan(api: DeSec, namespaces: Iterable[str], copies: List[Dict],
                 UPDATE user_domains
                    SET record_type = ?, ip_address = ?, ttl = 3600
                  WHERE COALESCE(is_custom, FALSE) = FALSE
-                   AND lower(full_domain) LIKE ? ESCAPE '!'
+                   AND (lower(full_domain) = ? OR lower(full_domain) LIKE ? ESCAPE '!')
                 """,
-                ('CNAME', api.base_domain, pattern),
+                ('CNAME', api.base_domain, f'{namespace}.{api.base_domain}', pattern),
             )
         connection.commit()