added companie mapping with yahoo tickers

src/economic/storage.rs

@@ -116,7 +116,7 @@ pub async fn build_event_index(chunks: &[ChunkInfo]) -> anyhow::Result<Vec<Event
     Ok(index)
 }
 
-/// NEW: Look up a specific event by loading only its chunk
+/// Look up a specific event by loading only its chunk
 pub async fn lookup_event_by_key(key: &str, index: &[EventIndex]) -> anyhow::Result<Option<EconomicEvent>> {
     // Find which chunk contains this event
     let entry = index.iter().find(|e| e.key == key);