Rename files based on the README.md

[Unprincess17]

In the README.md, the documented file names include entries such as:

cluster-trace-v2026-GenAI
...
├── base_model_update_latency_anon.csv   # Base model loading latency
...
└── lora_request_trace.csv               # Application-level performance data from the user side

I updated the actual file names in the repository so they now match the naming conventions shown in the README.md.

[CLAassistant]

All committers have signed the CLA.