prepare linuxX64: switch to kotlin.uuid.Uuid and ktor-server-cio

1. UUID: java.util.UUID.randomUUID() → commonMain helper Ids.new(prefix)
   wrapping kotlin.uuid.Uuid.random().  kotlin.uuid is stdlib (KMP: jvm +
   all native targets), so the call sites (ChatAgent, ChatConversation,
   SqliteWorkingMemoryStore) are now ready for native builds.  Format kept:
   '<prefix>-xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx'.

2. HTTP engine: ktor-server-netty → ktor-server-cio.  Netty is JVM-only;
   CIO is KMP (jvm, linuxX64, ios, etc.) and feature-complete for our
   needs (POST + SSE).  standalone/build.gradle.kts drops netty and adds
   cio; Main.kt imports io.ktor.server.cio.CIO and calls
   embeddedServer(CIO, port = port).

Netty is left in libs.versions.toml (catalog entry kept) in case anyone
needs to fall back; only :standalone stopped depending on it.

E2E verified end-to-end against litellm local/codding: standalone-1.0.0
tarball starts on AGENTIK_PORT, GET /health -> 'ok', POST
/agentik/conversations -> 201 with new UUID-format id, POST .../messages
returns real LLM answer ('Ассистент').  44/44 unit tests green.

standalone/src/commonMain/kotlin/pw/binom/agentik/standalone/persistence/Ids.kt

@@ -0,0 +1,14 @@
+package pw.binom.agentik.standalone.persistence
+
+import kotlin.uuid.Uuid
+
+/**
+ * Генератор id. Использует `kotlin.uuid.Uuid` из stdlib (KMP: jvm + native),
+ * чтобы не зависеть от `java.util.UUID` и подготовить код к linuxX64-сборке.
+ *
+ * Сохраняет формат `<prefix>-xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx` —
+ * `:server` его парсит как opaque string, без знания внутренней структуры.
+ */
+object Ids {
+    fun new(prefix: String): String = "$prefix-${Uuid.random()}"
+}

standalone/src/jvmMain/kotlin/pw/binom/agentik/standalone/Main.kt

@@ -1,7 +1,7 @@
 package pw.binom.agentik.standalone
 
+import io.ktor.server.cio.CIO
 import io.ktor.server.engine.embeddedServer
-import io.ktor.server.netty.Netty
 import io.ktor.server.response.respondText
 import io.ktor.server.routing.get
 import io.ktor.server.routing.routing
@@ -13,7 +13,7 @@ import pw.binom.agentik.standalone.mcp.McpRegistry
 import pw.binom.agentik.standalone.persistence.sqlite.SqliteStores
 /**
  * standalone-контейнер agentik:
- *  - :server (proto):  встраиваемый Ktor (Netty), порт AGENTIK_PORT (default 8080)
+ *  - :server (proto):  встраиваемый Ktor (CIO), порт AGENTIK_PORT (default 8080)
  *      POST /agentik/conversations                              -> ConversationSnapshot (201)
  *      GET  /agentik/conversations                              -> [ConversationSnapshot]
  *      GET  /agentik/conversations/{id}                         -> ConversationSnapshot
@@ -49,7 +49,7 @@ fun main() {
         tools = mcpRegistry.namedTools,
     )
 
-    val server = embeddedServer(Netty, port = port) {
+    val server = embeddedServer(CIO, port = port) {
         routing {
             get("/health") { call.respondText("ok") }
             agentikAgent(agent, path = "/agentik")

standalone/src/jvmMain/kotlin/pw/binom/agentik/standalone/agent/ChatAgent.kt

@@ -52,7 +52,7 @@ class ChatAgent(
 
     override fun createConversation(temp: Boolean): ProtoConversation {
         val now = now()
-        val id = "conv-${java.util.UUID.randomUUID()}"
+        val id = pw.binom.agentik.standalone.persistence.Ids.new("conv")
         val rec = ConversationRecord(
             id = id,
             title = null,

standalone/src/jvmMain/kotlin/pw/binom/agentik/standalone/agent/ChatConversation.kt

@@ -357,7 +357,7 @@ class ChatConversation(
     private fun now(): Instant =
         Instant.fromEpochMilliseconds(System.currentTimeMillis())
 
-    private fun newId(prefix: String): String = "$prefix-${java.util.UUID.randomUUID()}"
+    private fun newId(prefix: String): String = pw.binom.agentik.standalone.persistence.Ids.new(prefix)
 
     private fun encodeArgsJson(arguments: Map<String, Any?>): String {
         val el = kotlinx.serialization.json.JsonElement.serializer()

standalone/src/jvmMain/kotlin/pw/binom/agentik/standalone/persistence/sqlite/SqliteWorkingMemoryStore.kt

@@ -67,4 +67,4 @@ private fun Working_memory.toRow(): WorkingMemoryRow {
     )
 }
 
-private fun newId(): String = "wm-${java.util.UUID.randomUUID()}"
+private fun newId(): String = pw.binom.agentik.standalone.persistence.Ids.new("wm")