I feel like this is overhyping.
A happy wedding can just be a happy wedding.
I don't think these two are going to be so influential that their wedding will go down in history like that.
They are royalty, so they will go down in history, but not 'start of a new golden age'
It will probably be the high kings call to take control of trade if anything.
It's not about the wedding being the cause of a golden age, but rather a symptom of one.
If I were a historian writing a book, I'd be tempted to start with this wedding, exploring the circumstances that made it possible, and how it would be iconic of the age to come.
... Assuming that the next millennia or so is actually kind to the dwarves, that is.