Will someone accused of 498a be definitely be put in jail by IO before trial starts

I was married on May 1, 2013 and I got a son on March 20, 2014 and the child was delivered in Orissa. After that wife declined to come to Chandigarh. I filled section 9 RCR in Sep 2014 Chandigarh district court and she came for mediation but it failed but later our family resolved the differences and the case was withdrawn in June 2015. In August 2020, my wife left with our son again for Pune where her brother lives. Yesterday I got a call from a Police station that 498a complaint has been filled against me and my parents. IO asked me if I could come but I told him I can't come due to travel restriction caused by CORONA. However, I told him my side of story and we talked for almost 30 minutes. Then, he gave me the email ID of his station and asked me to send a comprehensive reply with all the evidences and I did the same. I told him I am a public servant and I am not running away. Is my arrest necessary? He told me not to think of jail as he is not going to write what my wife says. The IO seems to be very cooperating. I even told him that my wife has left on her own without any reason and I had reported this to Chandigarh Police station and I had sent an email regarding this to my wife and her father too to know here whereabouts. IO asked if I could send the copy of these to him on his whatsapp. I did. I have following questions: 1) My wife has declined the mediation. Now IO will do what? Will he make a charge sheet against me? Or will he give a due consideration to the various email and whatsapp chats and my letter to his police station email ID? 2) When will I go to jail? Shall I be called for this purpose explicitly right after the charge sheet? Or IO may use his discretion and may not call me for jail as I have already given my reply via email and he will simply submit his report to the court and from there trail starts. 3) Shall I get a summon for this to come to Pune from chandigarh? 4) My marriage is more than 7 years. Can 498a still be applied?