nx_video_swarm_probe.nx

nx_video_swarm_probe.nx -- the TRUE fan-out load measurement (the 8-party hardware question). The ping-pong QoE probe measures per-flow cadence; THIS one measures what an 8-person family call actually does to the edge: 8 REAL TLS-1.3+WSS peers in ONE room (= the relay's per-room cap), peer P0 paces 6KB room-framed video frames at the target cadence, and the relay broadcast fans each frame to the 7 receivers -- 7x write amplification through sites.elf pumps + nx_signaling_v2, all TLS. Every receiver drains every frame before the next send (backpressure-safe). Read order ROTATES each frame so no receiver is systematically read last. Per-frame MAX across receivers = "everyone sees it by". TWO PASSES (2026-07-03, operator: "we want way more than a 20 fps setup"): 20fps (ledger continuity with the existing vqoe_swarm8_* baselines) THEN 60fps (the new ladder top rung, vqoe_swarm8f60_*) -- the 60fps pass is the honest transport proof for the lifted ladder. HONESTY BOUNDS (printed): 1-sender/7-receiver from ONE Texas LAN host; a full 8x8 mesh is 8x the send load (extrapolate, don't claim); Minsk legs are task #25. Ledger-reported (return-and-report). expect_exit: 0 = BOTH passes SOUND license_tier: ORIGINAL