Document VM 102 security stack and update IPs to 192.168.1.105.

Add ARCHITECTURE.md and HOMELAB_IPS.md, refresh inventory and app configs
for Postgres, Neo4j, Homelab Command, pgAdmin, Homarr, and Homepage links.

Co-authored-by: Cursor <cursoragent@cursor.com>

apps/home-security-agent/README.md

@@ -52,12 +52,13 @@ Voeg in `targets.yaml` services toe. Voor diepere agent-gedrag later:
 
 Alle observaties gaan naar **PostgreSQL** (`agent.observation_runs`, `agent.findings`, `agent.incidents`).
 
-Bekijk ze in **Homelab Command**: http://192.168.1.211:8765/dashboard#security (tab Security → Home Security Agent).
+Bekijk ze in **Homelab Command**: http://192.168.1.105:8765/dashboard#security (tab Security → Home Security Agent).
 
 Eénmalig schema:
 
 ```bash
 docker exec -i postgres-homelab psql -U mo -d homelab < migrations/004_home_agent_observations.sql
+# Postgres draait op VM 102: ssh mo@192.168.1.105 → docker exec postgres-homelab psql ...
 ```
 
 Of vanuit homelab-command: `scripts/apply_mesh_migrations.sh` (past alle `migrations/*.sql` toe).