feat: implement Infra and Application layers for favorite heritages list / お気に入り一覧のInfra・Application層実装

[zigzagdev]

Motivation / 目的

Continue the favorite heritages list feature. This PR adds the pieces needed to turn a user's favorite ids into a displayable list of world heritages:

• Infra: WorldHeritageQueryService::getHeritagesByIds(), reusing the existing findByIdsPreserveOrder() + payload/DTO pipeline already used by searchHeritages().
• Application: GetFavoriteHeritagesUseCase, which combines FavoriteRepository::getFavoriteWorldHeritageIds() with getHeritagesByIds() to return a WorldHeritageDtoCollection for a given user.

Pagination is intentionally out of scope — it will be added later once needed.

What I have done / 実施内容

• Added WorldHeritageQueryServiceInterface::getHeritagesByIds(array $ids): WorldHeritageDtoCollection
• Implemented it in WorldHeritageQueryService
• Added GetFavoriteHeritagesUseCase::handle(int $userId): WorldHeritageDtoCollection

Test Results / テスト結果

• test_returns_world_heritage_dto_collection
• test_preserves_order_of_given_ids
• test_returns_empty_collection_when_no_ids_given
• test_skips_missing_ids_without_failing
• test_handle_returns_world_heritage_dto_collection_for_favorite_ids
• test_handle_returns_empty_collection_when_user_has_no_favorites

[codecov]

Codecov Report

❌ Patch coverage is 98.85057% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 64.05%. Comparing base (5e2a643) to head (74a2857).

Files with missing lines	Patch %	Lines
...orldHeritageQueryService_getHeritagesByIdsTest.php	97.67%	1 Missing ⚠️

Additional details and impacted files

@@                   Coverage Diff                    @@
##             feat/user-favorite     #570      +/-   ##
========================================================
+ Coverage                 63.70%   64.05%   +0.35%     
- Complexity                 1657     1671      +14     
========================================================
  Files                       142      145       +3     
  Lines                      8607     8694      +87     
========================================================
+ Hits                       5483     5569      +86     
- Misses                     3124     3125       +1     

Files with missing lines	Coverage Δ
...omains/WorldHeritage/WorldHeritageQueryService.php	96.56% <100.00%> (+0.08%)	⬆️
.../Tests/UseCase/GetFavoriteHeritagesUseCaseTest.php	100.00% <100.00%> (ø)
...s/UseCase/Favorite/GetFavoriteHeritagesUseCase.php	100.00% <100.00%> (ø)
...orldHeritageQueryService_getHeritagesByIdsTest.php	97.67% <97.67%> (ø)

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.

[zigzagdev]

Ok