feat: use FastAPI logger instead of rich

[himkt]

Before

INFO:     Uvicorn running on http://0.0.0.0:8000 (Press CTRL+C to quit)
INFO:     Started reloader process [1] using StatReload
INFO:     Started server process [47]
INFO:     Waiting for application startup.
INFO:     Application startup complete.
[15:22:26] INFO     Create tokenizer: tokenizer-janome.user_dictionary_path-None.system_dictionary_path-None.model_path-None.mode-A.dictionary_format-None                                                                                          tokenization.py:50
INFO:     192.168.65.1:47241 - "POST /api/v1/tokenize HTTP/1.1" 200 OK

After

INFO:     Started server process [14994]
INFO:     Waiting for application startup.
INFO:     Application startup complete.
INFO:     Uvicorn running on http://127.0.0.1:8000 (Press CTRL+C to quit)
INFO:     Create tokenizer: tokenizer-janome.user_dictionary_path-None.system_dictionary_path-None.model_path-None.mode-A.dictionary_format-None
INFO:     127.0.0.1:62229 - "POST /api/v1/tokenize HTTP/1.1" 200 OK