feat(telegram): add silent message option (#2382)

* feat(telegram): add silent message option (disable_notification)

Add support for sending Telegram messages silently without notification
sound via the `silent` parameter on the message tool.

Changes:
- Add `silent` boolean to message tool schema
- Extract and pass `silent` through telegram plugin
- Add `disable_notification: true` to Telegram API calls
- Add `--silent` flag to CLI `message send` command
- Add unit test for silent flag

Closes #2249

AI-assisted (Claude) - fully tested with unit tests + manual Telegram testing

* feat(telegram): add silent send option (#2382) (thanks @Suksham-sharma)

---------

Co-authored-by: Pocket Clawd <pocket@Pockets-Mac-mini.local>

src/channels/plugins/actions/telegram.ts

@@ -20,6 +20,7 @@ function readTelegramSendParams(params: Record<string, unknown>) {
   const threadId = readStringParam(params, "threadId");
   const buttons = params.buttons;
   const asVoice = typeof params.asVoice === "boolean" ? params.asVoice : undefined;
+  const silent = typeof params.silent === "boolean" ? params.silent : undefined;
   return {
     to,
     content,
@@ -28,6 +29,7 @@ function readTelegramSendParams(params: Record<string, unknown>) {
     messageThreadId: threadId ?? undefined,
     buttons,
     asVoice,
+    silent,
   };
 }