fix: Add final type casting for remaining type-checker issues

- Add cast import and type casting in tool_utils.py for ToolUsage constructor
- Add cast import and type casting in lite_agent.py for execute_tool_and_check_finality call

These changes complete the type-checker fixes for hosted tools implementation.

Co-Authored-By: João <joao@crewai.com>

src/crewai/lite_agent.py

@@ -564,9 +564,10 @@ class LiteAgent(FlowTrackable, BaseModel):
 
                 if isinstance(formatted_answer, AgentAction):
                     try:
+                        from typing import cast
                         tool_result = execute_tool_and_check_finality(
                             agent_action=formatted_answer,
-                            tools=self._parsed_tools,  # type: ignore[arg-type]
+                            tools=cast(List[Union[CrewStructuredTool, dict]], self._parsed_tools),
                             i18n=self.i18n,
                             agent_key=self.key,
                             agent_role=self.role,

src/crewai/utilities/tool_utils.py

@@ -54,10 +54,11 @@ def execute_tool_and_check_finality(
                             raise ValueError(f"Failed to set fingerprint: {e}")
 
         # Create tool usage instance - filter to only CrewStructuredTool instances for ToolUsage
+        from typing import cast
         crew_structured_tools = [tool for tool in tools if hasattr(tool, 'name') and hasattr(tool, 'result_as_answer') and not isinstance(tool, dict)]
         tool_usage = ToolUsage(
             tools_handler=tools_handler,
-            tools=crew_structured_tools,
+            tools=cast(List[CrewStructuredTool], crew_structured_tools),
             function_calling_llm=function_calling_llm,
             task=task,
             agent=agent,