Tune EUR/USD defaults: tighter SL, higher TP, A-grade filter, unblock ranging

Config changes from EUR/USD optimization rounds:
- sl_atr_multiplier 1.5→0.5, tp_atr_multiplier 1.0→1.5, min_rr 0.5→1.0
- Unblock ranging regime, restrict to A+/A quality on M15
- Lower entry thresholds: score 38→30, confidence 60→50
- Add M5-specific regime weights and config overrides in eurusd.py

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

pair_signals/eurusd.py

@@ -32,6 +32,28 @@ EUR_REGIME_WEIGHTS = {
     },
 }
 
+_M5_TRENDING = {
+    "ema_trend": 1.5, "rsi": 1.0, "macd": 2.5,
+    "bollinger": 0.5, "keltner": 2.0, "roc": 2.0,
+    "candlestick": 0.3, "divergence": 1.0, "adx": 1.0,
+}
+
+M5_REGIME_WEIGHTS = {
+    "trending_up": _M5_TRENDING,
+    "trending_down": _M5_TRENDING,
+    "trending": _M5_TRENDING,
+    "ranging": {
+        "ema_trend": 0.3, "rsi": 1.5, "macd": 1.5,
+        "bollinger": 1.5, "keltner": 2.0, "roc": 1.0,
+        "candlestick": 0.3, "divergence": 1.5, "adx": 0.5,
+    },
+    "transitioning": {
+        "ema_trend": 1.0, "rsi": 1.0, "macd": 2.5,
+        "bollinger": 0.5, "keltner": 2.5, "roc": 2.0,
+        "candlestick": 0.3, "divergence": 1.0, "adx": 1.0,
+    },
+}
+
 
 def make_config(
     primary_tf: Timeframe,
@@ -53,6 +75,14 @@ def make_config(
     config.backtest.blocked_hours_utc = [22, 23, 0, 1, 2, 3]
     config.backtest.allowed_weekdays = [0, 1, 2, 3, 4]
 
-    config.technical.regime_weights_override = EUR_REGIME_WEIGHTS
+    if primary_tf == Timeframe.M5:
+        config.technical.regime_weights_override = M5_REGIME_WEIGHTS
+        config.eur_strategy.sl_atr_floor = 0.8
+        config.eur_strategy.sl_atr_multiplier = 0.3
+        config.eur_strategy.min_quality_grades = ["A+", "A", "B"]
+        config.eur_strategy.min_entry_score = 28.0
+        config.eur_strategy.min_entry_confidence = 50.0
+    else:
+        config.technical.regime_weights_override = EUR_REGIME_WEIGHTS
 
     return config