fix: Make ToolCall arguments fully recursive

The previous definitions only allowed for a single level of nesting of lists/dicts
and was not truly recursive. Tool call inputs with more complex inputs would fail
validation and throw an exception.

src/llama_stack/models/llama/datatypes.py

@@ -31,7 +31,7 @@ class BuiltinTool(Enum):
 
 
 Primitive = str | int | float | bool | None
-RecursiveType = Primitive | list[Primitive] | dict[str, Primitive]
+type RecursiveType = Primitive | list[RecursiveType] | dict[str, RecursiveType]
 
 
 class ToolCall(BaseModel):