Reduce Unnecessary API Requests (ryanking13#296)

[tskim-cs]

Resolves #296

[tskim-cs]

Call search_train('부산', '수서', '20250202', '045000', '051000'), setting logging level of urllib3.connectionpool to DEBUG.

Before

2025-01-30 23:13:18.327 | DEBUG | urllib3.connectionpool | http://nf.letskorail.com:80 "GET /ts.wseq?... HTTP/1.1" 200 107
2025-01-30 23:13:18.613 | DEBUG | urllib3.connectionpool | https://app.srail.or.kr:443 "POST /ara/selectListAra10007_n.do HTTP/1.1" 200 None
2025-01-30 23:13:18.883 | DEBUG | urllib3.connectionpool | https://app.srail.or.kr:443 "POST /ara/selectListAra10007_n.do HTTP/1.1" 200 None
2025-01-30 23:13:19.213 | DEBUG | urllib3.connectionpool | https://app.srail.or.kr:443 "POST /ara/selectListAra10007_n.do HTTP/1.1" 200 None
2025-01-30 23:13:19.436 | DEBUG | urllib3.connectionpool | https://app.srail.or.kr:443 "POST /ara/selectListAra10007_n.do HTTP/1.1" 200 None
2025-01-30 23:13:19.548 | DEBUG | urllib3.connectionpool | https://app.srail.or.kr:443 "POST /ara/selectListAra10007_n.do HTTP/1.1" 200 None
2025-01-30 23:13:19.627 | DEBUG | urllib3.connectionpool | https://app.srail.or.kr:443 "POST /ara/selectListAra10007_n.do HTTP/1.1" 200 None

After

2025-01-30 23:12:24.919 | DEBUG | urllib3.connectionpool | http://nf.letskorail.com:80 "GET /ts.wseq?... HTTP/1.1" 200 107
2025-01-30 23:12:25.302 | DEBUG | urllib3.connectionpool | https://app.srail.or.kr:443 "POST /ara/selectListAra10007_n.do HTTP/1.1" 200 None

[ryanking13]

Thanks!