Potential bug in load_pdm_socre_syn: idx not used when loading PDM reward files

[KyuhwanYeon]

Hi, thanks again for releasing SimScale!

I noticed a potential bug in gtrs_agent.py when loading synthetic PDM reward files:

for idx in range(0, SYN_IDX + 1):
    file_name = f"simcale_16384_{SYN_GT}_v1.0-{SYN_IDX}"

I believe the filename should be:

for idx in range(0, SYN_IDX + 1):
    file_name = f"simcale_16384_{SYN_GT}_v1.0-{idx}"

Could you please confirm if this is intended or a small bug?

Thanks!