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/pgadmin/servers.json

@@ -1,8 +1,23 @@
 {
   "Servers": {
     "1": {
-      "Name": "Homelab PostgreSQL",
-      "Group": "Servers",
+      "Name": "Homelab PostgreSQL (VM102)",
+      "Group": "Homelab",
+      "Host": "192.168.1.105",
+      "Port": 5433,
+      "MaintenanceDB": "homelab",
+      "Username": "mo",
+      "Password": "WaQTUw2t",
+      "SSLMode": "prefer",
+      "PassFile": "",
+      "SSLCert": "",
+      "SSLKey": "",
+      "SSLRootCert": "",
+      "Comment": "Proxmox VM 102 Postgress — productie homelab DB"
+    },
+    "2": {
+      "Name": "Homelab PostgreSQL NAS backup",
+      "Group": "Homelab",
       "Host": "192.168.1.211",
       "Port": 5433,
       "MaintenanceDB": "homelab",
@@ -13,7 +28,7 @@
       "SSLCert": "",
       "SSLKey": "",
       "SSLRootCert": "",
-      "Comment": "Synology NAS — Homelab dashboard database"
+      "Comment": "Oude NAS-kopie — rollback / vergelijken"
     }
   }
 }