fix(telegram): wire sendPollTelegram into channel action handler (#16977)

The Telegram channel adapter listed no 'poll' action, so agents could
not create polls via the unified action interface. The underlying
sendPollTelegram function was already implemented but unreachable.

Changes:
- telegram.ts: add 'poll' to listActions (enabled by default via gate),
  add handleAction branch that reads pollQuestion/pollOption params and
  delegates to handleTelegramAction with action 'sendPoll'.
- telegram-actions.ts: add 'sendPoll' handler that validates question,
  options (≥2), and forwards to sendPollTelegram with threading, silent,
  and anonymous options.
- actions.test.ts: add test verifying poll action routes correctly.

Fixes #16977

src/channels/plugins/actions/actions.test.ts

@@ -489,6 +489,31 @@ describe("telegramMessageActions", () => {
     expect(String(call.messageId)).toBe("456");
     expect(call.emoji).toBe("ok");
   });
+
+  it("routes poll action to sendPoll with question and options", async () => {
+    const cfg = { channels: { telegram: { botToken: "tok" } } } as OpenClawConfig;
+
+    await telegramMessageActions.handleAction({
+      action: "poll",
+      params: {
+        to: "-100123",
+        pollQuestion: "Ready?",
+        pollOption: ["Yes", "No", "Maybe"],
+      },
+      cfg,
+      accountId: undefined,
+    });
+
+    expect(handleTelegramAction).toHaveBeenCalledWith(
+      expect.objectContaining({
+        action: "sendPoll",
+        to: "-100123",
+        question: "Ready?",
+        options: ["Yes", "No", "Maybe"],
+      }),
+      cfg,
+    );
+  });
 });
 
 describe("signalMessageActions", () => {