v0.2.1 - Async Channel Fixes

Fixed

• Async channels now actually work - Previous implementation was completely broken
  • Fixed send()/recv() to use actual SPSC implementation (was referencing non-existent fields)
  • Removed duplicate Channel/ChannelMode type definitions
  • Added exponential backoff (1ms → 100ms) to reduce CPU usage
  • Fixed Chronos deprecation warnings
• Deduplicated channels.nim - Removed 100+ lines of duplicate code
  • Now properly imports from channel_spsc instead of reimplementing everything

Added

• Comprehensive async channel tests (tests/unit/test_async_channel.nim)
• Added async tests to CI workflow

Changed

• Updated KNOWN_ISSUES.md to reflect async improvements

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Full Changelog: v1.0.0...v0.2.1