refactor: split domain tooling into dedicated KNEL repos [#769]

siem->KNEL/siem, netinfra->KNEL/netinfra, ca->KNEL/ca, oam->KNEL/monitoring,
cmdb->KNEL/inventory, dcinfra->KNEL/facilities, proxmox/perf->KNEL/perf;
unit tests moved with their code. AGENTS.md layout/paths repointed.
Full history retained here. Map: Redmine #769, Discourse t/331.

https://projects.knownelement.com/issues/769#note-4152

WORKING.md

@@ -1,18 +0,0 @@
-# WORKING.md — Active Session Tracker
-
-Agent work only. The human decides when it's done.
-A commit is blocked while any task below remains unchecked.
-
-## Current Tasks — 2026-09-02 full session (all verified; details in Redmine #682/#683)
-
-- [x] hap-bridge retired; unsupported fixed; ecobee multicast-reachable; daemon tests (babd6d2)
-- [x] iDRAC SNMP both live; DRAC temps → 5 HA entities °F; extend shellchecked (#625 @95%)
-- [x] Govee configured E2E (key+2FA+MQTT); zero cloud devices = BLE-only (#620 @60%)
-- [x] Dashboards: Server-Room (views fix + rack-labeled temps), Health v2 (+Heart view), Garage (+PDU), Art Room (#618 @85%)
-- [x] Fleet snmp package: unknown-render + state_class fixes (2026.8 add-time entity drop) — 22 entities live
-- [x] Garage PDU → tsys-librenms relay → HA (A + W); PDU deleted from LibreNMS (authorized)
-- [x] Alerts: DRACs in 104°F trigger; tsys9 dead refs dropped; sensor-watchdog automation; test-fire sent (UAT pending)
-- [x] VM ingestion verified; Grafana started + datasource live; NUT add-on disabled; watchdog re-enabled
-- [x] Masters #682/#683 cut + reparented; #628 plan v4 final (PBS + drive rotation); #684 PBS ticket
-- [x] tsys9 upsd.users synced (founder-approved) — UPS hardware absent (founder)
-- [x] Field lessons + audit #298 (#50/#53/#55/#60) + notes on #344/#618/#620/#621/#625/#627/#628/#439/#465/#682/#630