初始化回测核心引擎骨架

crates/fidc-core/src/lib.rs

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+pub mod broker;
+pub mod calendar;
+pub mod cost;
+pub mod data;
+pub mod engine;
+pub mod events;
+pub mod instrument;
+pub mod portfolio;
+pub mod rules;
+pub mod strategy;
+pub mod universe;
+
+pub use broker::{BrokerExecutionReport, BrokerSimulator};
+pub use calendar::TradingCalendar;
+pub use cost::{ChinaAShareCostModel, CostModel, TradingCost};
+pub use data::{
+    BenchmarkSnapshot,
+    CandidateEligibility,
+    DailyFactorSnapshot,
+    DailyMarketSnapshot,
+    DataSet,
+    DataSetError,
+    PriceField,
+};
+pub use engine::{BacktestConfig, BacktestEngine, BacktestError, BacktestResult, DailyEquityPoint};
+pub use events::{
+    AccountEvent,
+    FillEvent,
+    OrderEvent,
+    OrderSide,
+    OrderStatus,
+    PositionEvent,
+};
+pub use instrument::Instrument;
+pub use portfolio::{HoldingSummary, PortfolioState, Position};
+pub use rules::{ChinaEquityRuleHooks, EquityRuleHooks, RuleCheck};
+pub use strategy::{
+    CnSmallCapRotationConfig,
+    CnSmallCapRotationStrategy,
+    Strategy,
+    StrategyContext,
+    StrategyDecision,
+};
+pub use universe::{
+    BandRegime,
+    DynamicMarketCapBandSelector,
+    SelectionContext,
+    UniverseCandidate,
+    UniverseSelector,
+};