The shared edge config for rutster-edge (T2 modular) and rutster-allinone
(T1 solo). ~6-line site block + global options per spec §3.2 / TLS brief
§3(a):
* read_body 30s / read_header 30s — Twilio webhook budget (15s cap by
invariant 6 + slack).
* write 0 — 20ms media frames self-flush; never write-timeout.
* idle 24h / stream_close_delay 24h — above max call duration (invariant
3); the universal 60s-class default kills quiet mid-call WS.
* reverse_proxy + header_up — Caddy sets honest X-Forwarded-Proto/Host/For
for the engine's reconstruct_public_url (plan-A Task 5); engine-side
RUTSTER_TRUSTED_PROXIES is the trust gate (fail-closed default).
CI override via RUTSTER_LOCAL_CERTS=true uses Caddy's internal CA (no
ACME in CI per spec §9). The reload-during-live-call smoke (Task 9)
regresses the stream_close_delay mitigation against caddy #6420/#7222.
Signed-off-by: Aaron D. Lee <himself@adlee.work>