- Use contextlib.suppress instead of try/except/pass (SIM105)
- Prefix unused fixture arguments with underscore (ARG002)
- Replace asyncio.TimeoutError with TimeoutError (UP041)
- Apply ruff formatting to all files
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
Implements AlertDispatcher with multi-channel delivery support:
- DiscordChannel using webhook URL with embed formatting
- TelegramChannel using Bot API with MarkdownV2
- Rate limiting per channel (configurable)
- Circuit breaker pattern for failing channels
- Async delivery with retry and exponential backoff
- 23 comprehensive tests
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
