The acceptance-bar doc: a copy-paste path from a bare Linux host with a
domain to (1) a browser WebRTC call and (2) a real PSTN call via the
Twilio webhook. Volumes marked non-negotiable with the LE-lockout reason;
all-or-none RUTSTER_TWILIO_* contract stated (matches config.rs); host
networking recommended for direct media UDP.
Signed-off-by: Aaron D. Lee <himself@adlee.work>
