Fix lint errors (B023, W293, B007, PERF102)

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

lib/crewai/src/crewai/crew.py

@@ -957,15 +957,24 @@ class Crew(FlowTrackable, BaseModel):
                 )
 
                 # Wrap task execution to capture tokens immediately after completion
-                async def _wrapped_task_execution():
-                    result = await task.aexecute_sync(
-                        agent=exec_data.agent,
-                        context=context,
-                        tools=exec_data.tools,
+                # Use default arguments to bind loop variables at definition time (fixes B023)
+                agent = exec_data.agent
+                tools = exec_data.tools
+
+                async def _wrapped_task_execution(
+                    _task=task,
+                    _agent=agent,
+                    _tools=tools,
+                    _context=context,
+                ):
+                    result = await _task.aexecute_sync(
+                        agent=_agent,
+                        context=_context,
+                        tools=_tools,
                     )
                     # Capture tokens immediately after task completes
                     # This reduces (but doesn't eliminate) race conditions
-                    tokens_after = self._get_agent_token_usage(exec_data.agent)
+                    tokens_after = self._get_agent_token_usage(_agent)
                     return result, tokens_after
 
                 async_task = asyncio.create_task(_wrapped_task_execution())
@@ -1730,7 +1739,7 @@ class Crew(FlowTrackable, BaseModel):
         if workflow_metrics.per_task:
             # Sum up tokens for each agent from their tasks
             # We need to find which agent_id corresponds to each task's agent_name
-            for task_name, task_metrics in workflow_metrics.per_task.items():
+            for task_metrics in workflow_metrics.per_task.values():
                 agent_name = task_metrics.agent_name
                 # Find the agent_id for this agent_name from agent_info_map
                 # For now, we'll use the agent_name as a temporary key but this needs improvement
@@ -2126,7 +2135,7 @@ To enable tracing, do any one of these:
 
         if isinstance(agent.llm, BaseLLM):
             return agent.llm.get_token_usage_summary()
-        elif hasattr(agent, "_token_process"):
+        if hasattr(agent, "_token_process"):
             return agent._token_process.get_summary()
 
         return UsageMetrics()