What should I do about the prayers in which I forgot a prostration, believing that the prostration of forgetfulness (sujūd as-sahw) compensates for it, knowing that I follow the Maliki school of thought? Is it permissible for me to adopt another school of thought if it is easier? And how do I repeat the prayers if my ablution (wudu') breaks shortly after every prescribed prayer?

Prostration is one of the pillars of prayer. If it is forgotten due to absentmindedness, it cannot be compensated for by the prostration of forgetfulness (sujud al-sahw); rather, it must be performed. So, if one remembers the forgotten prostration before reaching its place in the next unit (rak'ah) of prayer, one should return to it and perform it. If one does not remember it until having started the recitation of the next rak'ah, then the rak'ah in which the prostration was forgotten is nullified, and the subsequent rak'ah takes its place. If one does not remember it until having finished the prayer, one should perform a complete rak'ah, provided that the separation (between remembering and finishing) was not too long or one's ablution (wudu') has not been invalidated. Otherwise, the prayer is void, and it must be repeated. As for one who omitted prostration out of ignorance, the majority of scholars hold that it must be made up (qada'), which is the most cautious and absolving for one's responsibility. However, Shaykh al-Islam Ibn Taymiyyah holds the view that making it up is not obligatory in this case.