Closes #18153: Introduce virtual circuit types (#18300)

* Closes #18153: Introduce virtual circuit types

* Fix TagTestCase

* Fix GraphQL API test

docs/models/circuits/virtualcircuit.md

@@ -18,6 +18,10 @@ The [provider account](./provideraccount.md) with which the virtual circuit is a
 
 The unique identifier assigned to the virtual circuit by its [provider](./provider.md).
 
+### Type
+
+The assigned [virtual circuit type](./virtualcircuittype.md).
+
 ### Status
 
 The operational status of the virtual circuit. By default, the following statuses are available:

docs/models/circuits/virtualcircuittype.md

@@ -0,0 +1,13 @@
+# Virtual Circuit Types
+
+Like physical [circuits](./circuit.md), [virtual circuits](./virtualcircuit.md) are classified by functional type. These types are completely customizable, and can help categorize circuits by function or technology.
+
+## Fields
+
+### Name
+
+A unique human-friendly name.
+
+### Slug
+
+A unique URL-friendly identifier. (This value can be used for filtering.)