debug: add diagnostic logging to inference export step

src/forecasting/chronos_inference.py

@@ -289,6 +289,15 @@ def run_inference(
         forecast_days=forecast_days
     )
 
+    # Diagnostic logging
+    print(f"[DEBUG] Results summary:", flush=True)
+    print(f"  Borders in results: {list(results['borders'].keys())}", flush=True)
+    for border, data in results['borders'].items():
+        if 'error' in data:
+            print(f"  {border}: ERROR - {data['error']}", flush=True)
+        else:
+            print(f"  {border}: OK (median values count: {len(data.get('median', []))})", flush=True)
+    
     # Export to parquet
     output_filename = f"forecast_{run_date}_{forecast_type}.parquet"
     output_path = os.path.join(output_dir, output_filename)