Is there a way to rename the files themselves with [Studio]/[Studio] - [Release Date] - [Title] after they are organized?
Is there a way to auto accept the scrape from StashDB if there’s 100% fingerprint match?
Not with Stash graphical interface. Stash by design doesn’t modify the files. There are many plugins for it though. See Search results for '#plugin rename' - Stash
You can play around Identify task for that. See:
There is also Stash Batch Save plugin which you can incorporate into your workflow, but it’s not automatic.