fix: correct calibration input paths for HuggingFace download

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: baogorek

modal_app/local_area.py

@@ -360,9 +360,10 @@ def coordinate_publish(
     calibration_dir = staging_dir / "calibration_inputs"
     calibration_dir.mkdir(parents=True, exist_ok=True)
 
-    weights_path = calibration_dir / "w_district_calibration.npy"
-    dataset_path = calibration_dir / "stratified_extended_cps.h5"
-    db_path = calibration_dir / "policy_data.db"
+    # hf_hub_download preserves directory structure, so files are in calibration/ subdir
+    weights_path = calibration_dir / "calibration" / "w_district_calibration.npy"
+    dataset_path = calibration_dir / "calibration" / "stratified_extended_cps.h5"
+    db_path = calibration_dir / "calibration" / "policy_data.db"
 
     if not all(p.exists() for p in [weights_path, dataset_path, db_path]):
         print("Downloading calibration inputs...")