This endpoint retrieves the latest onboarding status for a business.

The onboarding process collects information from the business to generate offers in cases when
platform doesn't have enough data to create pre-approved offers.
This endpoint provides information about the current state of the onboarding process,
including submission and review timestamps, and rejection reasons if applicable.

The status transitions as follows:

• AVAILABLE → IN_REVIEW (when submitted)
• IN_REVIEW → APPROVED (when approved)
• IN_REVIEW → REJECTED (when rejected)