[refactor] CityInfoReadService 리팩토링: getCityEntity 메서드 삭제

related to: #140

src/main/java/com/haejwo/tripcometrue/domain/city/service/CityInfoReadService.java

@@ -31,9 +31,10 @@ public class CityInfoReadService {
  private static final int WEATHER_MONTH_GAP = 3;
 
  @Transactional(readOnly = true)
- public CityInfoResponseDto getCityInfo(Long id) {
+ public CityInfoResponseDto getCityInfo(Long cityId) {
  return CityInfoResponseDto.fromEntity(
- getCityEntity(id)
+ cityRepository.findById(cityId)
+ .orElseThrow(CityNotFoundException::new)
  );
  }
 
@@ -56,8 +57,9 @@ public ExchangeRateResponseDto getExchangeRateByCityId(Long cityId) {
  }
 
  @Transactional(readOnly = true)
- public List<WeatherResponseDto> getWeatherInfo(Long id) {
- City city = getCityEntity(id);
+ public List<WeatherResponseDto> getWeatherInfo(Long cityId) {
+ City city = cityRepository.findById(cityId)
+ .orElseThrow(CityNotFoundException::new);
 
  // 현재 달 포함 향후 3개월
  int curMonth = LocalDate.now().getMonthValue();
@@ -75,11 +77,6 @@ public List<WeatherResponseDto> getWeatherInfo(Long id) {
  ).toList();
  }
 
- private City getCityEntity(Long id) {
- return cityRepository.findById(id)
- .orElseThrow(CityNotFoundException::new);
- }
-
  private List<Weather> sortWeatherInfos(List<Weather> weathers) {
  int lastIdx = weathers.size() - 1;