Tune EUR/USD trade setup: quality-scaled TP and tighter SL

EUR/USD A-grade signals had inverted quality curve (-1.65R) because all
trades got RR≈0.50 and mature_move logic penalized high-score entries.

Fix: add per-pair trade setup params (sl_atr_floor=1.2, min_rr=1.0,
mature_move_threshold=35) and apply quality_scale to both tp_mult and
min_rr so A-grade gets wider TP targets. Also wire EUR config into
backtest via PAIR_PRODUCERS registry.

Result: A-grade now +1.24R (was -1.65R), total EUR/USD +10.06R (was +4.20R).
XAU/USD unchanged at +13.01R.

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

test_all.py

@@ -1676,6 +1676,12 @@ def _():
     assert 5 not in cfg.allowed_weekdays  # No Saturday
     assert 6 not in cfg.allowed_weekdays  # No Sunday
     assert cfg.min_atr_threshold == 0.0003
+    assert cfg.sl_atr_floor == 1.2
+    assert cfg.min_rr_ratio == 1.0
+    assert cfg.mature_move_threshold == 35.0
+    assert cfg.tp_quality_scale["A+"] == 1.8
+    assert cfg.tp_quality_scale["A"] == 1.2
+    assert cfg.tp_quality_scale["C"] == 1.0
 
 
 @test("PlatformConfig has eur_strategy field")
@@ -1758,6 +1764,23 @@ def _():
     assert "EUR/USD" not in NewsEngine._get_affected_pairs("GBP")
 
 
+@test("EUR/USD trade setup uses quality-scaled TP and tighter SL")
+def _():
+    from pair_signals.eurusd import make_config
+    from signal_aggregator import SignalAggregator
+    config = make_config(Timeframe.H1)
+    config.backtest.session_filter = False
+    assert config.eur_strategy.sl_atr_floor == 1.2
+    assert config.eur_strategy.min_rr_ratio == 1.0
+    assert config.eur_strategy.tp_quality_scale["A"] == 1.2
+    agg = SignalAggregator(config)
+    df = make_ohlcv(n=300, start_price=1.0800, trend=0.0003, seed=77)
+    dfs = {Timeframe.H1: df, Timeframe.M15: df, Timeframe.H4: df}
+    report = agg.analyze_from_dataframes(symbol=EURUSD, dfs=dfs, use_news=False)
+    if report.trade_setup:
+        assert report.trade_setup.risk_reward >= 1.0 - 0.01
+
+
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