docs: Update for NetBox Discovery (Diode) setup and Slurpit removal

- Removed Slurpit section from current state (stack removed)
- Added NetBox Discovery (Diode) architecture documentation
- Added NetDisco to NetBox sync script documentation
- Updated network diagram with Diode components
- Added changelog entries for 2026-01-23

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

docs/06-CHANGELOG.md

@@ -1,3 +1,35 @@
+## 2026-01-23 - NetBox Discovery (Diode) Setup & Slurp'it Removal
+
+### Slurp'it Removal
+- [SLURPIT] Removed entire Slurp'it stack (portal, scanner, scraper, warehouse, mariadb, mongodb)
+- [SLURPIT] Decision: Use NetBox Discovery + NetDisco instead for better NetBox integration
+
+### NetBox Discovery (Diode) Installation
+- [DIODE] Installed Diode server stack via quickstart.sh
+- [DIODE] Containers: ingress-nginx, diode-auth, diode-ingester, diode-reconciler, hydra, postgres, redis
+- [NETBOX] Installed netboxlabs-diode-netbox-plugin via custom Dockerfile
+- [NETBOX] Ran plugin migrations for netbox_diode_plugin
+- [DIODE] Configured Nginx with public /auth/introspect endpoint for NetBox plugin
+- [DIODE] Connected NetBox to diode_default network for inter-container communication
+
+### Discovery Agent Setup
+- [DIODE] Deployed orb-agent container for network discovery
+- [DIODE] Configured network_discovery policy: 192.168.31.0/24, ports 22/80/161/443
+- [DIODE] Schedule: Every 30 minutes (*/30 * * * *)
+- [DIODE] Successfully discovered 26 hosts on first scan
+
+### NetDisco to NetBox Sync
+- [SYNC] Created Python sync script at /mnt/user/appdata/netdisco-netbox-sync/
+- [SYNC] Uses Diode SDK to ingest devices and IP addresses from NetDisco
+- [SYNC] Syncs: 4 devices (with vendor, model, OS) and 42 ARP entries (with MAC)
+- [SYNC] Containerized with Docker for easy deployment
+
+### Documentation
+- [DOCS] Updated 00-CURRENT-STATE.md with new discovery architecture
+- [DOCS] Removed Slurp'it references, added Diode and sync script documentation
+
+---
+
 ## 2026-01-22 - NetBox Migration to Shared PostgreSQL
 
 ### Database Consolidation