fix: add missing type annotations to fix mypy strict mode errors

Added type annotations to 10 files to resolve mypy type checking errors:
- Added return type annotations to methods missing them
- Added parameter type annotations where missing
- Fixed Optional type hints to be explicit
- Removed redundant type cast in crew.py
- Changed _execute_with_timeout return type from str to Any in agent.py

Additional type errors remain in other files throughout the codebase.

src/crewai/utilities/evaluators/task_evaluator.py

@@ -1,3 +1,5 @@
+from typing import Any
+
 from pydantic import BaseModel, Field
 
 from crewai.events.event_bus import crewai_event_bus
@@ -39,11 +41,11 @@ class TrainingTaskEvaluation(BaseModel):
 
 
 class TaskEvaluator:
-    def __init__(self, original_agent) -> None:
+    def __init__(self, original_agent: Any) -> None:
         self.llm = original_agent.llm
         self.original_agent = original_agent
 
-    def evaluate(self, task, output) -> TaskEvaluation:
+    def evaluate(self, task: Any, output: Any) -> TaskEvaluation:
         crewai_event_bus.emit(
             self, TaskEvaluationEvent(evaluation_type="task_evaluation", task=task)
         )
@@ -74,7 +76,7 @@ class TaskEvaluator:
         return converter.to_pydantic()
 
     def evaluate_training_data(
-        self, training_data: dict, agent_id: str
+        self, training_data: dict[str, Any], agent_id: str
     ) -> TrainingTaskEvaluation:
         """
         Evaluate the training data based on the llm output, human feedback, and improved output.

src/crewai/utilities/rpm_controller.py

@@ -20,18 +20,18 @@ class RPMController(BaseModel):
     _shutdown_flag: bool = PrivateAttr(default=False)
 
     @model_validator(mode="after")
-    def reset_counter(self):
+    def reset_counter(self) -> "RPMController":
         if self.max_rpm is not None:
             if not self._shutdown_flag:
                 self._lock = threading.Lock()
                 self._reset_request_count()
         return self
 
-    def check_or_wait(self):
+    def check_or_wait(self) -> bool:
         if self.max_rpm is None:
             return True
 
-        def _check_and_increment():
+        def _check_and_increment() -> bool:
             if self.max_rpm is not None and self._current_rpm < self.max_rpm:
                 self._current_rpm += 1
                 return True
@@ -55,12 +55,12 @@ class RPMController(BaseModel):
             self._timer.cancel()
             self._timer = None
 
-    def _wait_for_next_minute(self):
+    def _wait_for_next_minute(self) -> None:
         time.sleep(60)
         self._current_rpm = 0
 
-    def _reset_request_count(self):
-        def _reset():
+    def _reset_request_count(self) -> None:
+        def _reset() -> None:
             self._current_rpm = 0
             if not self._shutdown_flag:
                 self._timer = threading.Timer(60.0, self._reset_request_count)