fixing migration script

scripts/migrate_csv_to_db.py

@@ -114,11 +114,12 @@ def load_csv_data(data_dir: Path) -> pd.DataFrame:
         if not year:
             continue
         
-        csv_files = list(folder.glob("*.csv"))
-        if not csv_files:
+        # Specifically look for the KS2 results file
+        ks2_file = folder / "england_ks2final.csv"
+        if not ks2_file.exists():
             continue
         
-        csv_file = csv_files[0]
+        csv_file = ks2_file
         print(f"  Loading {csv_file.name} (year {year})...")
         
         try: