[KW-480] feat: http error code grpc runtime status error로 변경

[coffeesigma]

🔷 Jira Ticket ID

KW-480

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📌 작업 내용 및 특이사항

• gRPC 에러 표현할 수 있는 util class 생성
• gRPC server 로직에서 변경하여 에러 처리

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📚 참고사항

[Copilot]

Pull Request Overview

This PR introduces a gRPC error handling utility and updates service implementations to use this new exception handling approach.

• Added GrpcExceptionUtil to convert BaseErrorCode to StatusRuntimeException with metadata.
• Replaced CommonException usage with GrpcExceptionUtil in BuildingGrpcServiceImpl and AreaGrpcServiceImpl for consistent error handling.

Reviewed Changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 1 comment.

File	Description
src/main/java/com/doubleo/hospitalservice/global/exception/GrpcExceptionUtil.java	New utility for converting error codes to gRPC exceptions with metadata.
src/main/java/com/doubleo/hospitalservice/domain/building/grpc/server/BuildingGrpcServiceImpl.java	Updated error handling to use GrpcExceptionUtil for BUILDING_NOT_FOUND.
src/main/java/com/doubleo/hospitalservice/domain/area/grpc/server/AreaGrpcServiceImpl.java	Replaced CommonException with GrpcExceptionUtil for AREA_NOT_FOUND and BUILDING_NOT_FOUND scenarios.

Comments suppressed due to low confidence (1)

src/main/java/com/doubleo/hospitalservice/global/exception/GrpcExceptionUtil.java:8

• Add unit tests for the GrpcExceptionUtil to verify that the error code properties are correctly translated into gRPC metadata and status.

public class GrpcExceptionUtil {

[willjsw]

고생하셨습니다!