fix: 限制边缘节点仅使用 IPv4 并记录维护约定

.claude/skills/edge-node-multi-protocol/scripts/config.env.example

@@ -3,7 +3,7 @@
 
 # --- target VPS ---
 SERVER_IP="203.0.113.10"                       # public IPv4
-SERVER_IPV6="2001:db8::10"                      # public IPv6 (optional; leave empty to skip AAAA)
+SERVER_IPV6=""                                  # fleet is IPv4-only; do not create AAAA
 SSH_USER="root"                                 # root, or a sudo user (scripts escalate via sudo)
 SSH_KEY="$HOME/.ssh/your-vps-key.pem"           # private key for the VPS
 TZ="UTC"                                          # server timezone (e.g. UTC, Asia/Shanghai, America/Los_Angeles)
@@ -16,7 +16,7 @@ DOMAIN_ROOT="nodeA.example.com"                  # this node owns *.nodeA.exampl
 # Cloudflare is the default & has a turnkey record-creation script (02-cf-dns.py).
 # Any acme.sh-supported DNS provider works for the wildcard cert — set ACME_DNS_PLUGIN and
 # the matching credential vars below. For A/AAAA records on a non-CF provider, create them
-# yourself (see references/dns-records.md — it's two names, A + AAAA, DNS-only).
+# yourself (see references/dns-records.md — two names with A records, DNS-only).
 DNS_PROVIDER="cloudflare"                         # informational: cloudflare | dnspod | aliyun | route53 | other
 ACME_DNS_PLUGIN="dns_cf"                          # acme.sh plugin: dns_cf | dns_dp | dns_ali | dns_aws | dns_gd | ...