Add an optional `chassis_u` field for shelf-mounted devices (their height
in U where they stand on the shelf) and render it:
- gen_rack draws each tower chassis_u U's tall, rising above the 1U shelf
line; rail-mounted devices now paint on top so a PDU within a tower's
span (e.g. pdu03 over srv05/06) stays visible
- occupancy table shows each tower's real U-span (e.g. srv01 U37-U46)
- validate_item checks chassis_u is a positive integer; absent chassis_u
renders byte-identically to before
- set chassis_u for srv01-07 (10/8/6/6/7/7/6U); document the field in the
editing guide; regenerate rack01 artifacts
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Rebuild rack01 from the physically remounted hardware:
- Correct stale positions/ports/outlets for pp01, pp02, sw01, pdu01-04
- Model shelves as 1U trays (towers stand above without consuming rack U's);
add shf02 and empty half-depth shf03/shf04
- Add ups01/ups02; reseat nas01/02 and sw02-05; move srv04-07 onto shf02
- Add `wan` hardware kind; add WAN demarcation hosts wan01 (active) and
wan02 (staging)
- Document full live network wiring: srv01-07 -> pp02 -> sw01 (LAN) and
srv01 eth0 -> pp02 -> pp01 -> wan01 (WAN); keep non-active lines
(wan2, working-table patches, sw01 mgmt) in notes only
- Regenerate hardware index + rack01 elevation/network/power artifacts
Also includes the in-progress generator updates (gen_rack.py, gen_overview.py,
Makefile, tests) that the regenerated artifacts depend on.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
