Ahmadiya converted to sunni Husband and sunni wife

Assalamu Alaikum wa Rahmatullahi wa Barakatuh, I would like to ask about the validity of my marriage (nikah). My husband and his entire family were previously members of the Ahmadi (Qadiani) community. About 10 years ago, my husband and his immediate family formally accepted Sunni Islam. They signed the official declaration in Pakistan, confirming their belief in the finality of the Prophethood of Muhammad ﷺ and rejecting Mirza Ghulam Ahmad’s claims. Since their conversion, they have been practicing as Sunni Muslims — offering prayers in Sunni mosques, fasting in Ramadan, giving zakat, etc. I myself am Sunni Muslim by birth and belief. Our nikah was performed about one year ago, long after his conversion, and by a Sunni imam. Recently, when I informed my parents of his and his family’s past Ahmadi background, they became very concerned. They are unsure if the conversion is genuine or if my marriage remains Islamically valid. My questions are: 1. Given that my husband and his family converted around 10 years ago and affirm full belief in Sunni Islam, is our nikah valid and halal? Thankyou