fix(backend): Fix json to_dict method on string value

autogpt_platform/backend/backend/blocks/llm.py

@@ -552,7 +552,7 @@ class AIStructuredResponseGeneratorBlock(AIBlockBase):
             default="",
             description="The system prompt to provide additional context to the model.",
         )
-        conversation_history: list[Any] = SchemaField(
+        conversation_history: list[dict] = SchemaField(
             default=[],
             description="The conversation history to provide context for the prompt.",
         )

autogpt_platform/backend/backend/blocks/smart_decision_maker.py

@@ -53,7 +53,7 @@ class SmartDecisionMakerBlock(Block):
             default="Thinking carefully step by step decide which function to call. Always choose a function call from the list of function signatures.",
             description="The system prompt to provide additional context to the model.",
         )
-        conversation_history: list[Any] = SchemaField(
+        conversation_history: list[dict] = SchemaField(
             default=[],
             description="The conversation history to provide context for the prompt.",
         )

autogpt_platform/backend/backend/util/json.py

@@ -11,10 +11,6 @@ from .type import type_match
 def to_dict(data) -> dict:
     if isinstance(data, BaseModel):
         data = data.model_dump()
-
-    elif isinstance(data, str):
-        data = loads(data)
-
     return jsonable_encoder(data)