feat(BT-003): add event preset backtest comparison

app/models/backtest.py

@@ -3,6 +3,8 @@ from __future__ import annotations
 from dataclasses import dataclass, field
 from datetime import date
 
+from app.models.event_preset import EventPreset
+
 
 @dataclass(frozen=True)
 class BacktestPortfolioState:
@@ -107,6 +109,8 @@ class BacktestSummaryMetrics:
     total_option_payoff_realized: float
     max_ltv_unhedged: float
     max_ltv_hedged: float
+    margin_call_days_unhedged: int
+    margin_call_days_hedged: int
     margin_threshold_breached_unhedged: bool
     margin_threshold_breached_hedged: bool
 
@@ -125,3 +129,23 @@ class TemplateBacktestResult:
 class BacktestRunResult:
     scenario_id: str
     template_results: tuple[TemplateBacktestResult, ...]
+
+
+@dataclass(frozen=True)
+class EventComparisonRanking:
+    rank: int
+    template_slug: str
+    template_name: str
+    survived_margin_call: bool
+    max_ltv_hedged: float
+    hedge_cost: float
+    final_equity: float
+    result: TemplateBacktestResult
+
+
+@dataclass(frozen=True)
+class EventComparisonReport:
+    event_preset: EventPreset
+    scenario: BacktestScenario
+    rankings: tuple[EventComparisonRanking, ...]
+    run_result: BacktestRunResult