Two fixes:
1. Rename advertisedIP → advertisedHost throughout, relax contract from
"always a real IP" to "routable host from -ip flag (IP or resolvable
hostname)". This matches the actual -ip flag semantics which accepts
both IP addresses and server names.
2. Add TestCP13_2_BlockService_AdvertisedHost_NotOpaqueID that hits the
actual production wiring: BlockService with opaque localServerID +
routable advertisedHost → setupReplicaReceiver → verify exported
addresses use the routable host, not the opaque ID.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
pingqiuandClaude Opus 4.6
ac962fc833