Update email_rag/rag_timeline.py

email_rag/rag_timeline.py

@@ -23,6 +23,7 @@ def build_timeline(thread_id: str) -> str:
         subject = m.get("subject") or "(no subject)"
 
         # Try to format date nicely
+        # Many dates are like "2001-07-26T11:56:00Z
         try:
             dt = datetime.fromisoformat(date_str.replace("Z", "+00:00"))
             date_fmt = dt.strftime("%Y-%m-%d %H:%M")