feat: Add ktlint to backend and format all files

legalconsenthub-backend/src/main/kotlin/com/betriebsratkanzlei/legalconsenthub/user/UserService.kt

@@ -11,14 +11,14 @@ import org.springframework.stereotype.Service
 @Service
 class UserService(
     private val userRepository: UserRepository,
-    private val userMapper: UserMapper
+    private val userMapper: UserMapper,
 ) {
-
     fun getCurrentUser(): User {
         val principal = SecurityContextHolder.getContext().authentication.principal as CustomJwtTokenPrincipal
         val userId = principal.id ?: throw IllegalStateException("User ID not found")
 
-        return userRepository.findById(userId)
+        return userRepository
+            .findById(userId)
             .orElseThrow { UserNotFoundException(userId) }
     }
 
@@ -42,24 +42,27 @@ class UserService(
             throw UserAlreadyExistsException(userDto.keycloakId)
         }
 
-        val user = User(
-            keycloakId = userDto.keycloakId,
-            name = userDto.name,
-            organizationId = userDto.organizationId
-        )
+        val user =
+            User(
+                keycloakId = userDto.keycloakId,
+                name = userDto.name,
+                organizationId = userDto.organizationId,
+            )
 
         return userRepository.save(user)
     }
 
-    fun getUserById(userId: String): User {
-        return userRepository.findById(userId)
+    fun getUserById(userId: String): User =
+        userRepository
+            .findById(userId)
             .orElseThrow { UserNotFoundException(userId) }
-    }
 
     @Transactional
     fun updateUser(userDto: UserDto): User {
-        val user = userRepository.findById(userDto.keycloakId)
-            .orElseThrow { UserNotFoundException(userDto.keycloakId) }
+        val user =
+            userRepository
+                .findById(userDto.keycloakId)
+                .orElseThrow { UserNotFoundException(userDto.keycloakId) }
 
         user.name = userDto.name
         // Only update organization if it's not already set