Retrieves the current available credit limit for a customer in real-time.

• available_limit: net credit available — the raw credit limit (30% of income) minus any amount already committed in APPROVED or FUNDED applications. This is how much the customer can still borrow.
• committed_amount: total amount already committed in APPROVED and FUNDED applications.
• total_granted_limit: the raw credit limit from the credit engine (before deductions). Same as max_total_value returned by the create endpoint.