refactor(custom_robot): Add logging for dynamic trajectory control start

- Introduced a log message to indicate the start of dynamic trajectory control in the trajControl method, enhancing traceability during execution.

src/custom_robot.cpp

@@ -153,7 +153,7 @@ void CustomRobot::trajControl()
         LOG_ERROR("Controller not available for dynamic trajectory.");
         return;
     }
-
+    LOG_INFO("Dynamic trajectory control started");
     float vx = 0.3f;
     float delta = 0.06f;
     traj_count_ += traj_dt_;