1. Accept/reject/end from remote instance now resolves federatedId
to local dmChannelId via DB lookup, so the host can find its
VoiceRoom when the event arrives with only a federatedCallId.
Previously silently failed with "No active call" error.
2. Batch all dm_call_incoming state updates into a single
useVoiceStore.setState() call. Prevents SoundController from
starting multiple ringtone instances (async playSound guard
race when 4 separate set() calls each triggered the subscription).
3. Always overwrite callOrigin/federatedCallId (with null if absent)
on dm_call_incoming. Prevents stale values from a previous
federated call routing local accepts to the wrong instance.
Jannis Braun
5265117d29