- Register Go helper functions (modbus.crc16, hex.encode/decode,
util.bytes) into Lua states for Modbus RTU support
- Add plugins/modbus.lua with .modbus read/write commands
- Fix Reload race condition (hold lock across Unload+Load)
- Make App.Close nil-safe for sess
- Restore internal/console/console_test.go
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>