Lucien Cartier-Tilet
0ec7fdf11b
Implement smart constructor that validates relay IDs are within valid range (1-8 for 8-channel relay controller). Add accessor method as_u8() for safe access to inner value. Add comprehensive documentation to satisfy clippy requirements. TDD green phase: Tests from T017 now pass. Ref: T018 (specs/001-modbus-relay-control/tasks.md)