Docs referenced ddns_porkbun.sh / ddns_porkbun_test.sh, which never
matched the actual files (porkbun-ddns.sh, porkbun-ddns-test.sh).
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Root domain's subdomains are independent A records, not
wildcard-CNAME-inherited, so each one needs to be tracked explicitly
or the DDNS script won't keep it in sync on IP changes.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>