[RAQMC] Rare server connection issue

[adameus03]

I've seen it only once. It may not be a bug at all, but looks suspicious
[ERROR] 2025-01-22 12:35:31 (/home/user/base/LabMate/raqmc/walker.c:237): walker_transmit_readings_buffered: transfer failed: Server returned nothing (no headers, no data) (res=52)