feat: implement Presentation layer for GET /api/v1/favorites / お気に入り一覧のPresentation層実装

[zigzagdev]

Motivation / 目的

Expose the favorite heritages list built in the Application layer (GetFavoriteHeritagesUseCase) through a REST endpoint so the frontend can fetch the authenticated user's favorites.

What I have done / 実施内容

• Added GET /api/v1/favorites route
• Added FavoriteController::getFavorites, returning WorldHeritageDtoCollection::toSummaryArray() (matching the list-response convention already used by the heritages endpoints)

Test Results / テスト結果

• test_getFavorites_returns_200_with_favorite_heritages_when_authenticated
• test_getFavorites_returns_200_with_empty_array_when_user_has_no_favorites
• test_getFavorites_returns_401_when_unauthenticated
• test_getFavorites_returns_500_on_unexpected_error

[codecov]

Codecov Report

❌ Patch coverage is 98.30508% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 64.28%. Comparing base (74a2857) to head (0c4e887).
⚠️ Report is 1 commits behind head on feat/user-favorite.

Files with missing lines	Patch %	Lines
...Packages/Features/Tests/FavoriteControllerTest.php	97.72%	1 Missing ⚠️

Additional details and impacted files

@@                   Coverage Diff                    @@
##             feat/user-favorite     #571      +/-   ##
========================================================
+ Coverage                 64.05%   64.28%   +0.23%     
- Complexity                 1671     1677       +6     
========================================================
  Files                       145      145              
  Lines                      8694     8753      +59     
========================================================
+ Hits                       5569     5627      +58     
- Misses                     3125     3126       +1     

Files with missing lines	Coverage Δ
...ackages/Features/Controller/FavoriteController.php	88.88% <100.00%> (+7.93%)	⬆️
...Packages/Features/Tests/FavoriteControllerTest.php	99.07% <97.72%> (-0.93%)	⬇️

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[zigzagdev]

Ok