feat(nodes): add unknown as model base

Author: psychedelicious

invokeai/backend/model_manager/config.py

@@ -275,7 +275,7 @@ def from_model_on_disk(cls, mod: ModelOnDisk, **overrides):
 
 
 class UnknownModelConfig(ModelConfigBase):
-    base: Literal[BaseModelType.Any] = BaseModelType.Any
+    base: Literal[BaseModelType.Unknown] = BaseModelType.Unknown
     type: Literal[ModelType.Unknown] = ModelType.Unknown
     format: Literal[ModelFormat.Unknown] = ModelFormat.Unknown
 

invokeai/backend/model_manager/taxonomy.py

@@ -33,6 +33,7 @@ class BaseModelType(str, Enum):
     FluxKontext = "flux-kontext"
     Veo3 = "veo3"
     Runway = "runway"
+    Unknown = "unknown"
 
 
 class ModelType(str, Enum):