Fix pandas sorting bug in alias_sync

alias_sync.py

@@ -120,6 +120,9 @@ def sync_aliases(token: str, repo: str):
 
     df = pd.DataFrame(rows, columns=["UDISE_Code", "Alias_Name", "Source", "Year_Month", "Last_Updated"])
     
+    # Force string type to prevent sorting errors
+    df["UDISE_Code"] = df["UDISE_Code"].astype(str)
+    
     # Sort by UDISE code so that all identical schools are grouped together perfectly
     df = df.sort_values(by=["UDISE_Code", "Source"]).reset_index(drop=True)