fix(schema): fix kind access on write-typed schemas after read-only kind move

Retype the topological sorter's input to the read model (NodeSchemaAPI), and
convert YAML-loaded write schemas to their API form in the protocols command so
`kind` (a read-only computed field) resolves. Clears ty unresolved-attribute
errors introduced by moving kind/hash to the read models.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

Author: dgarros

infrahub_sdk/ctl/cli_commands.py

@@ -379,7 +379,11 @@ def protocols(
             data.load_content()
             schema_root_data = data.content or {}
             schema_root = SchemaRoot(**schema_root_data)
-            schema.update({item.kind: item for item in schema_root.nodes + schema_root.generics})
+            # `kind` is a read-model concept, so convert the write models loaded from disk to their
+            # API form to key them by kind consistently with the branch-fetched path below.
+            api_items = [node.convert_api() for node in schema_root.nodes]
+            api_items += [generic.convert_api() for generic in schema_root.generics]
+            schema.update({item.kind: item for item in api_items})
 
     else:
         client = initialize_client_sync()

infrahub_sdk/transfer/schema_sorter.py

@@ -7,13 +7,13 @@
 from .exceptions import SchemaImportError
 
 if TYPE_CHECKING:
-    from ..schema import NodeSchema
+    from ..schema import NodeSchemaAPI
 
 
 class InfrahubSchemaTopologicalSorter:
     def get_sorted_node_schema(
         self,
-        schemas: Sequence[NodeSchema],
+        schemas: Sequence[NodeSchemaAPI],
         required_relationships_only: bool = True,
         include: list[str] | None = None,
     ) -> list[set[str]]: