Add a middleware that checks if models are bound

**Is your feature request related to a problem? Please describe.**
When the model binding middleware isn't able to bind any model it will set it to null instead. And not throw any error. We need an additional middleware that checks for missing model binds.

Start by locating the model binding middleware and reviewing how an unbound model is represented. Define the middleware's expected behavior for missing binds, including the error outcome, and verify it with the existing project tests if available.

Written by the indexing model from the issue text.