Heartbeat Telegram delivery was failing when the bot token was
configured only via telegram.botToken in config (without TELEGRAM_BOT_TOKEN
environment variable).
Root cause: deliverOutboundPayloads was called without accountId parameter,
so sendMessageTelegram couldn't determine which account to use and couldn't
find the token from config.
Fix: Resolve default Telegram accountId when provider is "telegram" and pass
it to deliverOutboundPayloads. This follows the same pattern used elsewhere in
the codebase (e.g., cron uses resolveTelegramToken).
Changes:
- Added import for resolveDefaultTelegramAccountId
- Added accountId resolution for telegram provider
- Updated deliverOutboundPayloads call to include accountId
Fixes#318
Co-Authored-By: Claude <noreply@anthropic.com>