Separate operator guides from development contracts, relocate
implementation notes under `docs/devel/`, and update cross-references
and
hardware tooling paths. Add getting-started, user administration, and
firmware update guides while preserving firmware behavior.
Reposition the ESP32 and RS-232 reference within the notched outline,
preserve the A0 snapshot, and add second-pass two-layer routing
evidence.
Refresh validation reports and draft previews while keeping fabrication
status provisional.