What is the ruling on the prostration of forgetfulness (sujud al-sahw) if the Imam recites the Qunut supplication in the first and second rak'ahs of the Fajr prayer, and is the prayer of the congregant (ma'mum) who did not perform the prostration of forgetfulness with the Imam acceptable?

According to the Maliki school, qunut is recommended in the second rak'ah of the Fajr prayer, recited silently before bowing (ruku'), though it is permissible to recite it after. If one performs qunut in both the first and second rak'ahs, they have added to the prayer, and it is recommended for them to perform the prostration of forgetfulness (sujud ba'di) after the taslim. If the congregant (ma'mum) fails to follow the imam in the sujud ba'di, their prayer is still valid, and they should prostrate whenever they remember. If one omits qunut in the Fajr prayer, there is nothing due upon them.