use ultra model

apps/vbox/backend/build.gradle.kts

@@ -24,7 +24,7 @@ dependencies {
     implementation(project(":feature:chat:chat-common"))
     implementation(project(":feature:chat:chat-backend"))
 
-    implementation("org.jetbrains.kotlinx:kotlinx-coroutines-reactive:1.8.1")
+    implementation(libs.kotlinx.coroutines.reactive)
     implementation(libs.lettuce.lettuce.core)
     implementation(libs.ktor.server.core.jvm)
     implementation(libs.ktor.server.host.common.jvm)

apps/vbox/backend/src/main/kotlin/ru/shadowsparky/vbox/backend/data/ClientIdProviderImpl.kt

@@ -0,0 +1,9 @@
+package ru.shadowsparky.vbox.backend.data
+
+import org.koin.core.annotation.Factory
+import ru.shadowsparky.chat.backend.domain.ChatService
+
+@Factory
+class ClientIdProviderImpl : ChatService.ClientIdProvider {
+    override suspend fun provide(userId: Long): String = "vbox-$userId"
+}