Ensure parentheses are escaped in section headers, switch to en dash in
heading, and avoid Markdown links by outputting escaped text and URL.
Also improve line breaks for consistent layout.
Introduce helpers to fetch recent git commits and call an OpenAI-compatible
LLM to generate a short German executive summary appended to Telegram
notifications. Normalize async formatting in message builder and ensure
Promise handling when sending messages.
Also remove committed .env with secrets and add .env to .gitignore to
prevent future leaks.
