增加执行价快照计数接口

crates/fidc-core/src/data.rs

@@ -1393,6 +1393,14 @@ impl DataSet {
             .collect()
     }
 
+    pub fn execution_quote_count(&self) -> usize {
+        self.execution_quotes_by_date
+            .values()
+            .flat_map(|rows_by_symbol| rows_by_symbol.values())
+            .map(Vec::len)
+            .sum()
+    }
+
     pub fn add_execution_quotes(&mut self, quotes: Vec<IntradayExecutionQuote>) -> usize {
         let mut added = 0usize;
         let mut touched = HashSet::<(NaiveDate, String)>::new();