add send message

feature/chat/chat-backend/src/main/kotlin/ru/shadowsparky/chat/backend/domain/ProcessUserMessageUseCase.kt

@@ -4,6 +4,7 @@ import org.koin.core.annotation.Factory
 import ru.shadowsparky.backend.data.EnvFetcher
 import ru.shadowsparky.chat.domain.ChatRoles
 import ru.shadowsparky.chat.domain.Message
+import ru.shadowsparky.http.domain.BadRequestException
 
 @Factory
 class ProcessUserMessageUseCase(
@@ -12,9 +13,12 @@ class ProcessUserMessageUseCase(
     private val envFetcher: EnvFetcher
 ) {
     suspend fun execute(
+        userMessage: Message,
         userId: Long,
         systemPrompt: String = envFetcher.get("CHAT_SYSTEM_PROMPT").trim('"')
     ): Message {
+        if (userMessage.role != ChatRoles.USER) throw BadRequestException("invalid role")
+        storage.insert(userId, userMessage)
         val history = storage.query(userId, null, limit = 10).toList()
         val sortedHistory = history.sortedBy { it.timestamp }
         val systemMessage = Message(