feat(signal_v2-phase4-task3): integrate signal_generator into poll_loop

poll_loop now accepts dedup + settings kwargs (backwards-compatible defaults).
After each in-window cycle (stock pull + minute momentum + optional post-close),
generate_signals is called to populate state.signals for downstream Phase 5
pickup. main.py lifespan wires _ctx.dedup + settings into the poll_loop task.

1 integration test added (anomaly-free stop_loss path via direct generate_signals
call, exercises the same code path that poll_loop runs).

56 tests pass.

signal_v2/tests/test_pull_worker.py

@@ -95,3 +95,37 @@ async def test_post_close_cycle_updates_chronos_predictions():
     assert state.chronos_predictions["005930"]["conf"] == 0.85
     assert "005930" in state.daily_ohlcv
     assert "chronos/005930" in state.last_updated
+
+
+def test_poll_loop_calls_generate_signals_after_cycle(monkeypatch):
+    """Phase 4: generate_signals 가 cycle 후 state.signals 를 갱신한다."""
+    from unittest.mock import MagicMock
+    from signal_v2.state import PollState
+    from signal_v2.signal_generator import generate_signals
+
+    state = PollState()
+    state.portfolio = {"holdings": [{
+        "ticker": "005930", "name": "삼성전자",
+        "avg_price": 75000, "current_price": 69000,
+        "pnl_pct": -0.08, "profit_rate": -8.0,
+        "quantity": 100, "broker": "키움",
+    }]}
+    state.screener_preview = {"items": []}
+
+    dedup = MagicMock()
+    dedup.is_recent.return_value = False
+
+    settings = MagicMock()
+    settings.stop_loss_pct = -0.07
+    settings.take_profit_pct = 0.15
+    settings.chronos_spread_threshold = 0.6
+    settings.asking_bid_ratio_threshold = 0.6
+    settings.confidence_threshold = 0.7
+    settings.min_momentum_for_buy = "strong_up"
+
+    generate_signals(state, dedup, settings)
+
+    assert "005930" in state.signals
+    assert state.signals["005930"]["action"] == "sell"
+    assert state.signals["005930"]["confidence_webai"] == 1.0
+    dedup.record.assert_called_with("005930", "sell", confidence=1.0)