perf(data): compact immutable snapshots with current execution rules

crates/fidc-core/src/universe.rs

@@ -83,7 +83,7 @@ impl SelectionContext<'_> {
         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))
+                .is_some_and(|symbols| !symbols.is_empty() && !symbols.contains(factor.symbol.as_str()))
             {
                 continue;
             }
@@ -307,7 +307,7 @@ mod tests {
     fn market(symbol: &str, price: f64) -> DailyMarketSnapshot {
         DailyMarketSnapshot {
             date: d(),
-            symbol: symbol.to_string(),
+            symbol: symbol.into(),
             timestamp: Some("2025-01-02 10:00:00".to_string()),
             day_open: price,
             open: price,
@@ -333,7 +333,7 @@ mod tests {
     fn factor(symbol: &str, market_cap_bn: f64) -> DailyFactorSnapshot {
         DailyFactorSnapshot {
             date: d(),
-            symbol: symbol.to_string(),
+            symbol: symbol.into(),
             market_cap_bn,
             free_float_cap_bn: market_cap_bn,
             pe_ttm: 10.0,
@@ -347,7 +347,7 @@ mod tests {
     fn candidate(symbol: &str, is_st: bool, is_kcb: bool) -> CandidateEligibility {
         CandidateEligibility {
             date: d(),
-            symbol: symbol.to_string(),
+            symbol: symbol.into(),
             is_st,
             is_star_st: false,
             is_new_listing: false,