package org.example.boardback.service.impl;import jakarta.persistence.EntityNotFoundException;import lombok.RequiredArgsConstructor;import org.example.boardback.dto.board.file.BoardFileListDto;import org.example.boardback.dto.board.file.BoardFileUpdateRequestDto;import org.example.boardback.entity.board.Board;import org.example.boardback.entity.file.BoardFile;import org.example.boardback.entity...