Feat: 가맹점 트랜잭션 로그 조회 API 구현

[newspring0203]

🚀 개요

가맹점 트랜잭션 로그 조회 API를 구현하였습니다.

[Copilot]

Pull Request Overview

This PR implements a new API endpoint to retrieve merchant transaction logs with various filtering options.

• Introduces TransactionLogService to handle business logic for log retrieval.
• Adds TransactionLogRepository with a dynamic JPQL query for filtering.
• Provides a TransactionLogResponseDto for formatting responses and a MerchantTransactionLogController to expose the API endpoint.

Reviewed Changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 1 comment.

File	Description
src/main/java/com/fisa/pg/service/TransactionLogService.java	Adds service layer for retrieving filtered transaction logs.
src/main/java/com/fisa/pg/repository/TransactionLogRepository.java	Introduces a repository with a dynamic JPQL query for filtering.
src/main/java/com/fisa/pg/dto/response/TransactionLogResponseDto.java	Provides DTO conversion and formatting for transaction logs.
src/main/java/com/fisa/pg/controller/MerchantTransactionLogController.java	Exposes the transaction log retrieval endpoint via a REST controller.