SFU lab: deploy coturn on cast02 and smoke_sfu.sh.

Co-authored-by: Cursor <cursoragent@cursor.com>

sim/cluster0/scripts/smoke_sfu.sh

@@ -0,0 +1,28 @@
+#!/bin/sh
+# SFU lab smoke: Janus HTTP + signaling health (run on app node or dev).
+set -eu
+ROOT="$(cd "$(dirname "$0")/.." && pwd)"
+# shellcheck source=/dev/null
+. "$ROOT/scripts/lib/common.sh"
+load_cluster_env 2>/dev/null || true
+
+ORIGIN="${LAB_PUBLIC_ORIGIN:-https://apps.f0xx.org}"
+JANUS="${CAST02_IP:-10.7.16.237}"
+FAIL=0
+
+check() {
+  if "$@"; then
+    log "OK: $*"
+  else
+    log "FAIL: $*"
+    FAIL=1
+  fi
+}
+
+check curl -sf "http://${JANUS}:8088/janus/info" | grep -q janus
+check curl -sf "${ORIGIN}/app/androidcast_project/sfu/health" | grep -q '"ok"'
+
+if [ "$FAIL" -ne 0 ]; then
+  exit 1
+fi
+log "smoke_sfu_ok"