[Beta v3 PvP] Life-loss sound effect appears to be silent

**Status: needs triage**
**Affects:** MultiplayerPvP Closed Beta v3 (mqtt branch)

## Symptom
Tester report (general): "all BMP added SFXs are just broken in one way or another — I think the only one that still works 100% was timer."

The specific skip-SFX and win-jingle cases are tracked separately. Beyond those, the life-loss sound is suspected silent: in the old framework the `enemyInfo` handler owned the life-loss SFX, and that stream was removed in the MQTT conversion. The new authoritative-lives path (`pvp_player_lives`, `pvp_api/actions.lua:235-254`) does not appear to play any sound.

Needs a two-client repro pass to confirm which remaining sounds are silent/mistimed and enumerate them here.

Start with pvp_api/actions.lua:235-254 and the pvp_player_lives path, then compare it with the old enemyInfo handler described in the issue. Run a two-client PvP repro to check the life-loss sound and other remaining SFX, and document which sounds are silent or mistimed so the scope is confirmed.

Written by the indexing model from the issue text.