Self-contained test under poc-webrtc/ that does not touch the game.
Spins up an Express + WebSocket signaling + node-datachannel server
alongside a Socket.IO server, serves a simple browser client that
runs the same game-like traffic pattern (14Hz worldUpdates, input
events, ping/pong) over either transport based on a URL flag.
Captures per-session stats to a JSONL file and ships an analyze.js
that prints a per-(transport, phase) summary of RTT percentiles,
receive rate, and seq-gap counts so the TCP-vs-UDP-style comparison
becomes quantitative rather than eyeball.
Confirms node-datachannel installs and works on this platform and
that the dual-channel (reliable + unreliable) pattern is feasible
to maintain — both prerequisites for the real integration.
