Add rate limiting

config.test.yaml

@@ -5,6 +5,11 @@ logging:
   format: "text"  # text format for easy reading in development
   level: "debug"  # debug level to see all logs
 
+rate_limit:
+  enabled: false  # disabled for testing
+  requests_per_second: 100
+  burst: 200
+
 providers:
   mock:
     type: "openai"