Add IPAM foundation objects and schemas

Add device model, supernet prefixes, and ASN number pool for IPAM
foundation
Add IP prefix and address schemas with resource manager support
Add device model schema with port specifications
Add site IP prefix relationships and fabric device model relationships

infrahub/schemas/device_model.yml

@@ -0,0 +1,34 @@
+# Device Model Schema for EVPN-VXLAN Fabric
+# Hardware platform definitions with port specifications
+---
+version: "1.0"
+nodes:
+  # ================================================================
+  # Device Model
+  # ================================================================
+  - name: DeviceModel
+    namespace: Infra
+    description: Hardware device model with port specifications
+    label: Device Model
+    icon: mdi--chip
+    include_in_menu: false
+    human_friendly_id:
+      - name__value
+    display_label: "{{ name__value }}"
+    attributes:
+      - name: name
+        kind: Text
+        unique: true
+        description: "Model name (e.g., 7050SX3-48YC12)"
+      - name: description
+        kind: Text
+        optional: true
+      - name: manufacturer
+        kind: Text
+        description: "Manufacturer name (e.g., Arista)"
+      - name: host_port_count
+        kind: Number
+        description: "Number of host-facing ports (e.g., 48 for 25G SFP28 bank)"
+      - name: fabric_port_count
+        kind: Number
+        description: "Number of fabric ports (e.g., 12 for 100G QSFP100 bank)"