feat: add HTTPS (RFC 9460) DNS record type (#1360)

* feat: add HTTPS (RFC 9460) DNS record type

Adds 'HTTPS' to the DnsRecordType union so DNS check constructs can monitor a domain's HTTPS service-binding record (HTTP/3 advertisement via alpn, plus ipv4hint/ipv6hint/ech). Updates the DnsAssertionBuilder @example to the recommended assertion forms.

* docs: keep the recordType description generic (HTTPS as an @example)

* docs: trim the HTTPS assertion example to match the terse pattern

Author: sbezludny

packages/cli/src/constructs/dns-assertion.ts

@@ -21,6 +21,10 @@ export type DnsAssertion = CoreAssertion<DnsAssertionSource>
  * // Response code assertions
  * DnsAssertionBuilder.responseCode().equals('NOERROR')
  * DnsAssertionBuilder.responseCode().equals('NXDOMAIN')
+ *
+ * // HTTPS record assertions (HTTP/3 advertisement)
+ * DnsAssertionBuilder.textAnswer('alpn="([^"]*)"').contains('h3')
+ * DnsAssertionBuilder.jsonAnswer('$.Answer[0].data').contains('h3')
  * ```
  */
 export class DnsAssertionBuilder {

packages/cli/src/constructs/dns-request.ts

@@ -8,6 +8,7 @@ export type DnsRecordType =
   | 'NS'
   | 'TXT'
   | 'SOA'
+  | 'HTTPS'
 
 export type DnsProtocol =
   | 'UDP'
@@ -24,6 +25,7 @@ export interface DnsRequest {
    * @example "A"
    * @example "AAAA"
    * @example "TXT"
+   * @example "HTTPS"
    */
   recordType: DnsRecordType