I upload dSYMs for my Sentry iOS integration, but I'm seeing source code appear in the traces. I want to see line numbers and filenames of crashes or errors (and any included text) but not code. How can I do this?

This is called source context, and it can be disabled depending on which method you use to upload your dSYMs to Sentry. All methods and how to disable it can be found here (basically you want to remove/turn off include sources).