refactor(switches): standardize all switch names to <site>-<rack>-<function>-<NN>
Rename all 5 switches across all layers (DNS, DHCP, device hostname,
conman console, ser2net, udev symlinks, repo files) to follow the
<site>-<rack>-<function>-<count> convention:
pfv-core-sw01 → pfv-r5-core-01 (rack 5 core)
pfv-tor3-mgmt → pfv-r3-tor-mgmt-01 (rack 3 mgmt TOR)
pfv-tor3-stor → pfv-r3-tor-stor-01 (rack 3 storage TOR)
pfv-r2-tor-top → pfv-r2-tor-01 (rack 2 TOR)
subodev-torsw01 → pfv-r6-mgmt-01 (rack 6 mgmt)
Dead switch (pfv-r2-sw, port 2007) removed from mapping.txt.
pfv-rrinfra-rtr unchanged (router, not a switch).
Device hostnames changed via conman. Configs regenerated on pfv-tsys4.
All .cmds files, validate-conman.sh, and AGENTS.md updated. [#369]
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mrcharles
f9954fd9b4