FR: Telegram integration - notify on completion or error in long-running processing

**Is your feature request related to a problem? Please describe.**
It is useful to be notified via an alert when research is complete or an error halts processing.

**Describe the solution you'd like**
Telegram integration.  User would set up a bot account on Telegram and provide the key and ID to Sidekick.

**Describe alternatives you've considered**

**Additional context**
