The server rejects renderer state reports with "Current track not found
in queue nor autoplay" after QBZ-initiated queue loads, because it assigns
non-standard queue_item_ids (first track = track_id, rest = 1..N).
Omit current_queue_item_id and next_queue_item_id from all outbound
renderer reports. The server already knows the current track from
SET_STATE commands and adds the correct queue_item_id when forwarding
to controllers.
Also add info-level diagnostic logging to both report paths (periodic
frontend reports and command-response reports) and the protobuf encoder
for verifying wire content.
vicrodh