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>

tests/test_vol_breakout.py

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+"""vol_breakout 현물 롱 단위 테스트."""
+
+from __future__ import annotations
+
+import pandas as pd
+
+from bithumb.operations.multi_portfolio import count_empty_buy_slots, empty_multi_portfolio
+from bithumb.simulation.vol_breakout import (
+    baseline_15m_signal_at,
+    spot_long_action,
+)
+
+
+def test_spot_long_action_buy_only_when_flat() -> None:
+    assert spot_long_action(1, False) == "buy"
+    assert spot_long_action(1, True) is None
+
+
+def test_spot_long_action_sell_only_when_long() -> None:
+    assert spot_long_action(-1, True) == "sell"
+    assert spot_long_action(-1, False) is None
+
+
+def test_baseline_signal_breakout() -> None:
+    n = 30
+    closes = [100.0] * n
+    closes[-1] = 120.0
+    df = pd.DataFrame({
+        "datetime": pd.date_range("2026-01-01", periods=n, freq="15min"),
+        "open": closes,
+        "high": [c + 1 for c in closes],
+        "low": [c - 1 for c in closes],
+        "close": closes,
+        "volume": [1.0] * n,
+    })
+    sig = baseline_15m_signal_at(df, n - 1, lookback=5, atr_mult=0.01)
+    assert sig == 1
+
+
+def test_empty_buy_slots_dynamic_split() -> None:
+    pf = empty_multi_portfolio(["TRX", "NEAR", "WLD"], cash_krw=900_000)
+    assert count_empty_buy_slots(pf, ["TRX", "NEAR", "WLD"]) == 3
+    pf["positions"]["TRX"]["coin_qty"] = 100.0
+    assert count_empty_buy_slots(pf, ["TRX", "NEAR", "WLD"]) == 2
+    pf["positions"]["NEAR"]["coin_qty"] = 10.0
+    assert count_empty_buy_slots(pf, ["TRX", "NEAR", "WLD"]) == 1