Implement Telegram node

[asclearuc]

Problem Statement

Telegram node needs to be implemented
It should support

• polling mode
• direct mode

It should recognize message type (image, document), and send it on correct lane

Proposed Solution

Telegram node using Python

Alternatives Considered

No response

Affected Modules

• server (C++ engine)
• client-typescript
• client-python
• client-mcp
• nodes (pipeline)
• ai
• chat-ui
• dropper-ui
• vscode
• tika

[github-actions]