feat(vol_breakout): 15m 현물 롱 라이브·모니터·cron 운영 추가

vol_breakout 멀티종목 tick, vol_live HTML 모니터, 마감 봉만 저장하는 캔들 다운로드,
텔레그램 체결 알림, cron/watch 감시 스크립트 및 테스트를 포함한다.

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

scripts/3_run_vol_monitor_serve.sh

@@ -0,0 +1,55 @@
+#!/usr/bin/env bash
+# vol_live 모니터 HTTP 서버 (포트 기본 8766 — Binance 8765와 분리)
+set -euo pipefail
+# shellcheck source=scripts/_cron_env.sh
+source "$(dirname "$0")/_cron_env.sh"
+
+PIDFILE="${CRON_PROJECT_ROOT}/data/spot/operations/vol_monitor.pid"
+PORT="${VOL_MONITOR_PORT:-8766}"
+export VOL_MONITOR_PORT="$PORT"
+
+if [ "${1:-}" = "--stop" ]; then
+  if [ -f "$PIDFILE" ]; then
+    pid="$(cat "$PIDFILE")"
+    if kill -0 "$pid" 2>/dev/null; then
+      kill "$pid"
+      echo "stopped pid $pid"
+    fi
+    rm -f "$PIDFILE"
+  else
+    echo "pid file 없음"
+  fi
+  exit 0
+fi
+
+if [ -f "$PIDFILE" ]; then
+  old_pid="$(cat "$PIDFILE")"
+  if kill -0 "$old_pid" 2>/dev/null; then
+    if lsof -iTCP:"$PORT" -sTCP:LISTEN -p "$old_pid" >/dev/null 2>&1; then
+      echo "이미 실행 중: pid $old_pid → http://127.0.0.1:${PORT}/vol_live_monitor.html"
+      exit 0
+    fi
+    kill "$old_pid" 2>/dev/null || true
+  fi
+  rm -f "$PIDFILE"
+fi
+
+ensure_cron_log_dir "data/spot/operations"
+LOG="${CRON_PROJECT_ROOT}/data/spot/operations/vol_monitor_serve.log"
+PYTHON="$(resolve_bithumb_python)" || exit 1
+
+nohup "$PYTHON" "${CRON_PROJECT_ROOT}/scripts/3_run_vol_monitor.py" --serve-only >> "$LOG" 2>&1 &
+pid=$!
+disown "$pid" 2>/dev/null || true
+echo "$pid" > "$PIDFILE"
+sleep 2
+
+if curl -sf -o /dev/null "http://127.0.0.1:${PORT}/vol_live_monitor.html"; then
+  echo "모니터 시작: http://127.0.0.1:${PORT}/vol_live_monitor.html"
+  echo "로그: $LOG"
+  echo "종료: bash scripts/3_run_vol_monitor_serve.sh --stop"
+else
+  echo "서버 기동 실패 — 로그 확인: $LOG" >&2
+  tail -20 "$LOG" 2>/dev/null || true
+  exit 1
+fi