- Inbound federation connections now matched by source IP against
configured peer URLs (QUIC clients don't present TLS certs, so
fingerprint matching fails for inbound direction).
- Added periodic room announcement task (1s poll) that sends
FederationRoomJoin to peers when new rooms appear with local
participants. Handles rooms created after federation link is up.
- Added find_peer_by_addr() to FederationManager.
Federation link topology: each relay pair has 2 connections (outbound
from each side). Outbound sends signals, peer's inbound receives them.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>