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/cli/program/message/register.send.ts

@@ -22,7 +22,8 @@ export function registerMessageSendCommand(message: Command, helpers: MessageCli
         .option("--card <json>", "Adaptive Card JSON object (when supported by the channel)")
         .option("--reply-to <id>", "Reply-to message id")
         .option("--thread-id <id>", "Thread id (Telegram forum thread)")
-        .option("--gif-playback", "Treat video media as GIF playback (WhatsApp only).", false),
+        .option("--gif-playback", "Treat video media as GIF playback (WhatsApp only).", false)
+        .option("--silent", "Send message silently without notification (Telegram only)", false),
     )
     .action(async (opts) => {
       await helpers.runMessageAction("send", opts);