Hotfix: Ensure scaffolding is done before initializing the redirect controller

[madsrasmussen]

Description

This PR addresses an issue encountered when changing from editing an existing entity to creating a new one of the same type. In some workspaces, when users attempted to create a new entity, the isNew state, which should be set to true upon creation, was mistakenly retained as false from the editing state at first. This resulted in a redirect from the create URL back to the edit URL.

To fix this, this PR ensures that the redirect controller is initialized after the scaffolding logic is complete. Since the scaffolding/create method is already async, it makes sense to await this so we first start observing the "isNew" state afterward. This way, we ensure that the state we observe is correct.

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Chore (minor updates related to the tooling or maintenance of the repository, does not impact compiled assets)