- Add TelegramChannelMap config field to support channel aliases (#channel_name)
- Implement 4 new notification functions for sending to specific channels:
- notify_telegram_channel(channel, message): send markdown message to channel
- send_telegram_file_channel(channel, path, caption?): send file to channel
- notify_message_as_file_telegram(path): read and send file as message
- notify_message_as_file_telegram_channel(channel, path): read and send file to channel
- Enhance telegram.go with channel resolution logic supporting both named channels and numeric IDs
- Update function registry with documentation and examples for new functions
- Add path expansion support (~, $HOME) to file operations for better usability
- Update example config with telegram_channel_map documentation
j3ssie