fix: BULLISH confidence 임계값 75로 복원 (#205)

CLAUDE.md 규칙 개정에 따라 BULLISH 시장은 75로 유지.
시장 전망별 임계값: BEARISH=90, NEUTRAL=80, BULLISH=75.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/main.py

@@ -505,8 +505,9 @@ async def trading_cycle(
         outlook = playbook.market_outlook
         if outlook == MarketOutlook.BEARISH:
             min_confidence = 90
+        elif outlook == MarketOutlook.BULLISH:
+            min_confidence = 75
         else:
-            # BULLISH/NEUTRAL: use base threshold (min 80 per CLAUDE.md non-negotiable rule)
             min_confidence = base_threshold
         if match.confidence < min_confidence:
             logger.info(

tests/test_main.py

@@ -2729,18 +2729,13 @@ class TestMarketOutlookConfidenceThreshold:
         assert call_args.kwargs["action"] == "BUY"
 
     @pytest.mark.asyncio
-    async def test_bullish_outlook_uses_same_threshold_as_neutral(
+    async def test_bullish_outlook_lowers_buy_confidence_threshold(
         self,
         mock_broker: MagicMock,
         mock_market: MagicMock,
         mock_telegram: MagicMock,
     ) -> None:
-        """BUY with confidence 77 should be suppressed even in bullish market.
-
-        CLAUDE.md non-negotiable rule: confidence < 80 → force HOLD.
-        BULLISH outlook does NOT lower the threshold below 80.
-        (issue #205)
-        """
+        """BUY with confidence 77 should proceed in bullish market (threshold=75)."""
         engine = MagicMock(spec=ScenarioEngine)
         engine.evaluate = MagicMock(return_value=self._make_buy_match_with_confidence(77))
         playbook = self._make_playbook_with_outlook("bullish")
@@ -2772,8 +2767,7 @@ class TestMarketOutlookConfidenceThreshold:
 
         call_args = decision_logger.log_decision.call_args
         assert call_args is not None
-        # confidence 77 < 80 → must be suppressed to HOLD
-        assert call_args.kwargs["action"] == "HOLD"
+        assert call_args.kwargs["action"] == "BUY"
 
     @pytest.mark.asyncio
     async def test_bullish_outlook_suppresses_very_low_confidence_buy(
@@ -2782,7 +2776,7 @@ class TestMarketOutlookConfidenceThreshold:
         mock_market: MagicMock,
         mock_telegram: MagicMock,
     ) -> None:
-        """BUY with confidence 70 should be suppressed even in bullish market (threshold=80)."""
+        """BUY with confidence 70 should be suppressed even in bullish market (threshold=75)."""
         engine = MagicMock(spec=ScenarioEngine)
         engine.evaluate = MagicMock(return_value=self._make_buy_match_with_confidence(70))
         playbook = self._make_playbook_with_outlook("bullish")