docs: add timeframe to entity lookup examples

README.md

@@ -113,9 +113,9 @@ mcporter --config "$CONFIG" call news.get_latest_events topic=macro limit=5
 ### 2) Events for an entity
 
 ```bash
-mcporter --config "$CONFIG" call news.get_events_for_entity entity=Bitcoin limit=10
-mcporter --config "$CONFIG" call news.get_events_for_entity entity=ETH limit=10
-mcporter --config "$CONFIG" call news.get_events_for_entity entity=ETF limit=10
+mcporter --config "$CONFIG" call news.get_events_for_entity entity=Bitcoin timeframe=24h limit=10
+mcporter --config "$CONFIG" call news.get_events_for_entity entity=ETH timeframe=3d limit=10
+mcporter --config "$CONFIG" call news.get_events_for_entity entity=ETF timeframe=7d limit=10
 ```
 
 ### 3) Event summary (by cluster_id)