test: qualify execution clock regression time types

crates/fidc-core/src/broker.rs

@@ -11614,7 +11614,7 @@ mod tests {
 
     #[test]
     fn later_execution_clocks_do_not_replenish_the_same_observed_volume() {
-        let date = NaiveDate::from_ymd_opt(2025,1,2).unwrap();
+        let date = chrono::NaiveDate::from_ymd_opt(2025,1,2).unwrap();
         let broker = BrokerSimulator::new_with_execution_price(
             ChinaAShareCostModel::default(), ChinaEquityRuleHooks, PriceField::Last,
         ).with_volume_limit(true).with_volume_percent(0.25).with_liquidity_limit(false);
@@ -11633,7 +11633,7 @@ mod tests {
         assert_eq!(first.legs[0].execution_timestamp,Some(clock));
         assert_eq!(first.liquidity_consumption[0].timestamp,quotes[0].timestamp);
         ledger.apply_liquidity_consumption(&first.liquidity_consumption);
-        let later = clock + Duration::seconds(1);
+        let later = clock + chrono::Duration::seconds(1);
         let second = broker.select_execution_fill_with_ledger(
             &snapshot.symbol,&snapshot,&quotes,OrderSide::Sell,MatchingType::MinuteLast,
             Some(later),Some(later),100,100,100,100,true,None,None,None,&ledger,None,