There's no way to inform beforehand and no reason to.
When you say an inland file, what type of PR app have you filed? If it's a spousal sponsorship (because you were common law, I assume), you may want to send more info earlier - eg the record of wedding you get after the ceremony, a couple pictures (couple + a few guests /eg parents), and the wedding certificate later when you get it.
For other apps, for the most part, it won't affect the processing since your spouse is already a PR. Just make sure to explain that spouse is NOT applying for PR status/not part of your app/does not affect your app. Even the marriage certificate not strictly required but good to include a copy. Unlike a spousal app, no need to send anything util you get the wedding cert.