fix: update forecast simulation log to use oh_date instead of start_date

src/aeros_simulation/router.py

@@ -568,7 +568,7 @@ async def get_forecast_eaf(
 
     forecast_msg = (
         f"Forecast simulation started via Temporal. "
-        f"Period: {start_date.strftime('%Y-%m-%d')} to {end_date.strftime('%Y-%m-%d')}"
+        f"Period: {oh_date.strftime('%Y-%m-%d')} to {end_date.strftime('%Y-%m-%d')}"
     )
 
     return StandardResponse(