added lei to isin mapping

src/corporate/helpers.rs

@@ -57,4 +57,14 @@ pub fn price_key(p: &CompanyPrice) -> String {
     } else {
         format!("{}|{}|{}", p.ticker, p.date, p.time)
     }
+}
+
+pub fn parse_float(s: &str) -> Option<f64> {
+    s.replace("--", "").replace(",", "").parse::<f64>().ok()
+}
+
+pub fn parse_yahoo_date(s: &str) -> anyhow::Result<NaiveDate> {
+    NaiveDate::parse_from_str(s, "%B %d, %Y")
+        .or_else(|_| NaiveDate::parse_from_str(s, "%b %d, %Y"))
+        .map_err(|_| anyhow::anyhow!("Bad date: {s}"))
 }