fix: /users/{username} api의 lazy initialize 에러를 수정한다

src/main/kotlin/org/gitanimals/render/controller/PersonaController.kt

@@ -25,7 +25,7 @@ class PersonaController(
 
     @GetMapping("/users/{username}")
     fun getUserByName(@PathVariable("username") username: String): UserResponse {
-        return UserResponse.from(userService.getUserByName(username))
+        return UserResponse.from(userService.getUserByNameWithAllContributions(username))
     }
 
     @GetMapping("/personas/{persona-id}")

src/main/kotlin/org/gitanimals/render/domain/UserRepository.kt

@@ -1,10 +1,21 @@
 package org.gitanimals.render.domain
 
 import org.springframework.data.jpa.repository.JpaRepository
+import org.springframework.data.jpa.repository.Query
+import org.springframework.data.repository.query.Param
 
 interface UserRepository : JpaRepository<User, Long> {
 
     fun findByName(name: String): User?
 
+    @Query(
+        """
+            select u from User as u
+            left join fetch u.contributions
+            where u.name = :name
+        """
+    )
+    fun findByNameWithContributions(@Param("name") name: String): User?
+
     fun existsByName(name: String): Boolean
 }

src/main/kotlin/org/gitanimals/render/domain/UserService.kt

@@ -48,6 +48,9 @@ class UserService(
     fun getUserByName(name: String): User = userRepository.findByName(name)
         ?: throw IllegalArgumentException("Cannot find exists user by name \"$name\"")
 
+    fun getUserByNameWithAllContributions(name: String): User = userRepository.findByName(name)
+        ?: throw IllegalArgumentException("Cannot find exists user by name \"$name\"")
+
     @Transactional
     fun createNewUser(name: String, contributions: Map<Int, Int>): User =
         userRepository.save(User.newUser(name, contributions))