fix reasoning order in examples (#186)

I think we need to put reasoning-related outputs first to encourage CoT
reasoning.

examples/agent_patterns/input_guardrails.py

@@ -30,8 +30,8 @@ If the guardrail trips, we'll respond with a refusal message.
 
 ### 1. An agent-based guardrail that is triggered if the user is asking to do math homework
 class MathHomeworkOutput(BaseModel):
-    is_math_homework: bool
     reasoning: str
+    is_math_homework: bool
 
 
 guardrail_agent = Agent(

examples/agent_patterns/llm_as_a_judge.py

@@ -23,8 +23,8 @@ story_outline_generator = Agent(
 
 @dataclass
 class EvaluationFeedback:
-    score: Literal["pass", "needs_improvement", "fail"]
     feedback: str
+    score: Literal["pass", "needs_improvement", "fail"]
 
 
 evaluator = Agent[None](