add quote_chance to randomly skip quoting (reduce spam)
- 50% chance to quote-post as normal
- 50% chance to just post bufo with rkey reference
- configurable via QUOTE_CHANCE env var
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>