@visajourneydr Here's the update.
We finished our interview. Our interviewing officer asked us basic questions about our relationship (e.g. how we met, when we thought of marriage, how often we visited each other, how our wedding went, where we've traveled since). We showed him our passports, certified marriage certificate, and several recent pictures. He was friendly and pleasant throughout and the conversation went smoothly (in total, maybe 20 minutes of talking). And that was it. He didn't ask to see any other of the documentation listed on the USCIS letter that we had brought (e.g. birth certificates, affidavit of support -- I guess he had the copies from our I-485). I was surprised, but he said that he had enough information.
In particular, he did not ask about the I-693 or anything vaccination related.
We were approved the day after the interview.