[agent] SDK -> 2.51.0 to get time_to_first_token (#1237)

Author: maxkosty

agent/requirements.txt

@@ -5,7 +5,7 @@ openai-agents==0.3.0
 pydantic==2.10.3
 pydantic-settings==2.7.0
 python-dotenv==1.0.1
-sentry-sdk[fastapi]==2.50.0
+sentry-sdk[fastapi]==2.51.0
 eval_type_backport==0.2.2
 
 # Development dependencies