Refactored the single 1200-line es24n_conf.py into six modules plus a
slim entry point, in preparation for the upcoming network-based config
workflow. Each file has a clear, single responsibility:
ui.py — ANSI colours, display primitives, input prompts
serial_port.py — SerialPort class (termios/fcntl/select)
models.py — IOMConfig and ShelfConfig dataclasses
redfish.py — Redfish API client (shared by all workflows)
workflow_serial.py — Serial-based IOM network configuration workflow
workflow_firmware.py — IOM and Fabric Card firmware update workflow
es24n_conf.py — Entry point and main menu only
No functional changes. All imports verified.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
