HF RL Explorer

Improve error handling for large parameter retrieval and fix f-string formatting

Improve error handling for large parameter retrieval and fix f-string formatting: a task in LegoFlow-SWE (Harbor dataset). When retrieving very large array parameters from MAPDL (e.g., arrays with dimensions around 10 million elements), the operation fails with a generic MapdlExitedError :

The task

When retrieving very large array parameters from MAPDL (e.g., arrays with dimensions around 10 million elements), the operation fails with a generic `MapdlExitedError`:

Part of Lego-X/LegoFlow-SWE.