减少日频数据读取临时分配

crates/fidc-core/src/universe.rs

@@ -80,7 +80,7 @@ impl SelectionContext<'_> {
             }
         };
         let mut decisions = Vec::new();
-        for factor in self.data.factor_snapshots_on(self.decision_date) {
+        for factor in self.data.factor_snapshot_rows_on(self.decision_date) {
             if self
                 .dynamic_universe
                 .is_some_and(|symbols| !symbols.is_empty() && !symbols.contains(&factor.symbol))
@@ -213,7 +213,7 @@ impl UniverseSelector for DynamicMarketCapBandSelector {
             risk_decisions: Vec::new(),
         };
 
-        diagnostics.factor_total = ctx.data.factor_snapshots_on(ctx.decision_date).len();
+        diagnostics.factor_total = ctx.data.factor_snapshot_rows_on(ctx.decision_date).len();
         diagnostics.risk_decisions = ctx.selection_risk_decisions();
         diagnostics.not_eligible_count = diagnostics.risk_decisions.len();
         diagnostics.paused_count = diagnostics