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/extensions.yml

@@ -47,6 +47,17 @@ nodes:
         kind: Text
         optional: true
         description: "Shared MAC for anycast gateway (format: xxxx.xxxx.xxxx)"
+      - name: spine_count
+        kind: Number
+        optional: true
+        description: "Number of spines (2-4)"
+      - name: leaf_pair_count
+        kind: Number
+        optional: true
+        description: "Number of MLAG leaf pairs"
+      - name: mtu
+        kind: Number
+        default_value: 9214
     relationships:
       - name: spine_asn
         peer: InfraAutonomousSystem
@@ -58,6 +69,16 @@ nodes:
         identifier: fabric__sites
         cardinality: many
         optional: true
+      - name: spine_model
+        peer: InfraDeviceModel
+        cardinality: one
+        optional: true
+        description: Hardware model used for spines
+      - name: leaf_model
+        peer: InfraDeviceModel
+        cardinality: one
+        optional: true
+        description: Hardware model used for leafs
       - name: devices
         peer: InfraDevice
         identifier: fabric__devices