fix: clarify AssertJ vs JUnit assertion guidance in quarkus-tdd

Changed "Always use AssertJ" to "Prefer AssertJ for value checks" and
documented the intended pattern: JUnit assertThrows/assertDoesNotThrow
for exception lifecycle, AssertJ for value validation. This matches
the actual code examples in the document.

docs/ja-JP/skills/quarkus-tdd/SKILL.md

@@ -357,9 +357,10 @@ mvn jacoco:check
 - メッセージバリデーション付き例外シナリオに`assertThrows`を使用
 
 ### アサーション
-- JUnitアサーションの代わりに**常にAssertJ**（`assertThat`）を使用
+- 値チェックにはJUnitアサーションより**AssertJを優先**（`assertThat`）
 - 読みやすさのためにAssertJのfluent APIを使用
-- 例外: `assertThatThrownBy(() -> ...).isInstanceOf(...).hasMessageContaining(...)`
+- 例外: JUnitの`assertThrows`でキャプチャし、AssertJでメッセージを検証
+- 成功パス: JUnitの`assertDoesNotThrow`を使用
 
 ### イベント駆動テスト
 - `AdviceWith`と`MockEndpoint`でCamelルートをテスト

docs/tr/skills/quarkus-tdd/SKILL.md

@@ -858,9 +858,10 @@ mvn jacoco:check
 - %80+ satır kapsamı, %70+ branch kapsamı hedefleyin
 
 ### Assertion'lar
-- JUnit assertion'ları yerine **her zaman AssertJ** (`assertThat`) kullanın
+- Değer kontrolleri için JUnit assertion'ları yerine **AssertJ'yi tercih edin** (`assertThat`)
 - Okunabilirlik için akıcı AssertJ API'si kullanın: `assertThat(list).hasSize(3).contains(item)`
-- Exception'lar için: `assertThatThrownBy(() -> ...).isInstanceOf(...).hasMessageContaining(...)`
+- Exception'lar için: JUnit `assertThrows` ile yakalayın, ardından AssertJ ile mesajı doğrulayın
+- Fırlatılmayan başarı yolları için: JUnit `assertDoesNotThrow` kullanın
 - Koleksiyonlar için: `extracting()`, `filteredOn()`, `containsExactly()`
 
 ### Entegrasyon Testi

docs/zh-CN/skills/quarkus-tdd/SKILL.md

@@ -357,9 +357,10 @@ mvn jacoco:check
 - 异常场景使用`assertThrows`并验证消息
 
 ### 断言
-- **始终使用AssertJ**（`assertThat`）代替JUnit断言
+- 值检查**优先使用AssertJ**（`assertThat`）而非JUnit断言
 - 使用流式AssertJ API提高可读性
-- 异常断言: `assertThatThrownBy(() -> ...).isInstanceOf(...).hasMessageContaining(...)`
+- 异常: 使用JUnit `assertThrows`捕获，再用AssertJ验证消息
+- 成功路径: 使用JUnit `assertDoesNotThrow`
 
 ### 事件驱动测试
 - 使用`AdviceWith`和`MockEndpoint`测试Camel路由

skills/quarkus-tdd/SKILL.md

@@ -861,9 +861,10 @@ mvn jacoco:check
 - Aim for 80%+ line coverage, 70%+ branch coverage
 
 ### Assertions
-- **Always use AssertJ** (`assertThat`) instead of JUnit assertions
+- **Prefer AssertJ** (`assertThat`) over JUnit assertions for value checks
 - Use fluent AssertJ API for readability: `assertThat(list).hasSize(3).contains(item)`
-- For exceptions: `assertThatThrownBy(() -> ...).isInstanceOf(...).hasMessageContaining(...)`
+- For exceptions: use JUnit `assertThrows` to capture, then AssertJ to validate the message
+- For non-throwing success paths: use JUnit `assertDoesNotThrow`
 - For collections: `extracting()`, `filteredOn()`, `containsExactly()`
 
 ### Testing Integration