시간표 조회 datagsm api로 변경

[sooooooobinn]

#️⃣연관된 이슈

ex) #56

📝작업 내용

• 클라이언트 DataGSM용으로 변경
• 시간표 api에서 교육청/학교 코드 파라미터 제거

스크린샷 (선택)

💬리뷰 요구사항(선택)

리뷰어가 특별히 봐주었으면 하는 부분이 있다면 작성해주세요

ex) 메서드 XXX의 이름을 더 잘 짓고 싶은데 혹시 좋은 명칭이 있을까요?

[gemini-code-assist]

Code Review

This pull request migrates the timetable retrieval functionality from the direct NEIS Open API to the DataGSM API. This change simplifies the request payload by removing the office code and school code parameters, updates the configuration properties to use DataGSM settings, and integrates the required API key authentication header. No review comments were provided, so there is no additional feedback.

Important

The consumer version of Gemini Code Assist on GitHub is being sunset. Starting June 18, 2026, new organization installations will be blocked, and all code review activity will officially cease on July 17, 2026.
For more details on the timeline and next steps, please review the Help Documentation.