Cease all actions until you are ready to proceed with the case. Yes, you can effectively postpone the case indefinitely by just contacting them at least once per year. What document is pending? Just an FE note will not always stop them from scheduling an interview if all documents have been submitted and fees paid. If NVC does schedule the interview, I would just contact the consulate and explain that, due to a job complication, you wish to postpone until mid 2025.