I say, and with God's success: The pillar of reading is fulfilled by reciting an ayah from the Quran, and this is present in an ayah from Al-Fatiha. Reciting Al-Fatiha along with another surah is one of the obligations of prayer, and we do not need intention for the reading, nor is prostration for forgetfulness required; because we do not need intention for the pillar at all, and God knows best.