Implement file CRUD

[reddevilmidzy]

파일 생성, 조회, 변경, 삭제를 구현하였습니다.
API 명세를 프론트엔드와 먼저 상의하진 않았었고 임의로 일단 구현했습니다. 프론트엔드에서 변경 요청이 있다면 수정하겠습니다.

파일 생성: POST /problems/{problem_id}/{category}/ "multipart/form-data"
단일 파일 조회: GET /problems/{problem_id}/{category}/{filename}/
카테고리로 파일 조회: GET /problems/{problem_id}/{category}/
파일 삭제: DELETE problems/{problem_id}/{category}/{filename}/
파일 컨텐츠 변경: PUT /problems/{problem_id}/{category}/{filename}/ { "content" : "" }
파일 제목 변경: PUT /problems/{problem_id}/{category}/ {"old_filename": "", "new_filename": ""}

revision 기능과 같이 PR을 올리면 파일변경이 너무 많아지고 또 리뷰하기 힘들 것 같아 나눴습니다.

close: #36

[w8385]

CRUD👍

[utilForever]

우선 1차로 확인했습니다.

[Copilot]

Pull Request Overview

This PR adds full CRUD support for problem-related file management, including creating, retrieving, listing, deleting, and updating both file contents and filenames. It also introduces end-to-end Tokio-based handler tests and updates routing and dependencies.

• Implemented file_manager module with models, handlers, and error types
• Updated build_router in lib.rs to mount new CRUD routes under /problems
• Added comprehensive Tokio tests in tests/file_manager/handlers.rs
• Updated Cargo.toml with new dependencies (anyhow, uuid, serde, etc.)

Reviewed Changes

Copilot reviewed 10 out of 11 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
tests/mod.rs	Registers the new file_manager test module
tests/file_manager/handlers.rs	Adds full async tests for upload/get/list/delete/update
src/lib.rs	Nests /problems routes and includes new handlers
src/file_manager/models.rs	Defines FileMetadata, request types, and Language enum
src/file_manager/handlers.rs	Implements all file CRUD handlers
src/errors/language_error.rs	Defines LanguageError used in language parsing
Cargo.toml	Adds dependencies: anyhow, uuid, serde, etc.

Comments suppressed due to low confidence (1)

src/file_manager/handlers.rs:244

• By default, Axum's Json extractor returns 400 Bad Request when required fields are missing, but the test update_file_missing_content expects a 422 Unprocessable Entity. Consider adding a custom rejection handler or mapping the Json extractor error to return StatusCode::UNPROCESSABLE_ENTITY for missing content.

pub async fn update_file_content(

[utilForever]

코드 리뷰 대응하느라 고생하셨습니다.

[w8385]

CRUD 구현 수고 많으셨습니다 !!!