ni554n/truecallerjs_bot ? reverse-engineered prompt

Build me a Telegram bot that can look up phone number details using the Truecaller service.

I want users to be able to talk to the bot in Telegram, log in to Truecaller, reuse an existing installation ID if they already have one, log out, and ask for basic info about the bot and their current setup. It should be easy to deploy on Deno, use Deno KV to keep the login or session data, and be ready for webhook based Telegram hosting.

Please make it feel like a simple, useful bot for occasional caller ID lookups, not a big app. Include clear replies for success and error cases, especially when login or lookup fails. If anything needs current library or platform details, look them up online first so the setup works with today’s docs.