Fix issues #609, #649 and correct RandLA-Net preprocessing

[lkpopo]

Summary

This PR fixes the following issues and improves data preprocessing:

1. Issues TypeError: unhashable type: 'numpy.ndarray' when saving test results with Custom3D dataset #609, Summarize the question. (e.g., "How to do inference on custom dataset ? ") #649:

   • Adjusted log printing positions.
   • Corrected data type conversions.

2. RandLA-Net preprocessing:

   • Applied the intended data augmentation that was missing.
   • Fixed precision issues for large point coordinates by converting to float64 before processing, then back to float32.

Notes

• No changes to model architecture.
• Only fixes bugs and improves preprocessing reliability.