fix: unify telegram thread handling

src/telegram/bot/delivery.test.ts

@@ -138,6 +138,34 @@ describe("deliverReplies", () => {
     );
   });
 
+  it("keeps message_thread_id=1 when allowed", async () => {
+    const runtime = { error: vi.fn(), log: vi.fn() };
+    const sendMessage = vi.fn().mockResolvedValue({
+      message_id: 4,
+      chat: { id: "123" },
+    });
+    const bot = { api: { sendMessage } } as unknown as Bot;
+
+    await deliverReplies({
+      replies: [{ text: "Hello" }],
+      chatId: "123",
+      token: "tok",
+      runtime,
+      bot,
+      replyToMode: "off",
+      textLimit: 4000,
+      thread: { id: 1, scope: "dm" },
+    });
+
+    expect(sendMessage).toHaveBeenCalledWith(
+      "123",
+      expect.any(String),
+      expect.objectContaining({
+        message_thread_id: 1,
+      }),
+    );
+  });
+
   it("does not include link_preview_options when linkPreview is true", async () => {
     const runtime = { error: vi.fn(), log: vi.fn() };
     const sendMessage = vi.fn().mockResolvedValue({