as of today, some of the critical metrics for performance measurements are NOT reported by IGW framework.
while checking the code I did see that some of those metrics are reported by the slo predictor.

slo predictor is a plugin and the framework should not rely on it to have these metrics (e.g., one can run IGW without it).

we should add these metrics to the framework (while slo predictor can keep reporting the predicted ttft, predicted tpot, etc, e.g., predicted_xxx).