No jail time, no problem for GC.

If IO asked you to leave or did not ask for more documents from you, that means the materials IO collected from you is enough for your 485 package.

I believe you already handed in to the IO the following two important documents:
1). Arrest open record: collected from police department.
2). Court files: collected from your local court office, including the one you mentioned and the receipt copy you paid if fine was in action.

If you tell them in 2 offices that you will have an immigration interview, they will tell you what you need to report to IO. I believe you already did that.

To collect the open arrest record, you have to request your open record in the local police department and wait for 15 days to have it. They will send you a postcard and ask you to pick it up. A few dollar for this request.

As I know, no jail time even arrested is not that bad. You may wait 45 days after interview to hear a good news.

Good luck,