isBlockedDoorIp blocked the dotted IPv4-mapped form (::ffff:169.254.169.254)
but the hex form ::ffff:a9fe:a9fe (=169.254.169.254 IMDS) / ::ffff:7f00:1
(=127.0.0.1) fell through the IPv6 branch and returned false. Decode the hex
IPv4-mapped form to dotted IPv4 and run the existing blocked-range checks.
Co-Authored-By: Claude Opus 4.8 (1M context) <[email protected]>