Retrieve the data submission checklist for an entity

{
    "message": "Entity data checklist retrieved successfully",
    "status": "success",
    "data": {
        "entity_id": "01JABC1234567890ABCDEFGHIJ",
        "kyc_status": "in_review",
        "requirement_set": {
            "name": "NGN Retail Business KYC v2.1",
            "version": "2.1"
        },
        "fields": [
            {
                "field_name": "company_registration_number",
                "field_description": "Company registration number issued by the Corporate Affairs Commission (CAC)",
                "is_required": true,
                "requires_review_approval": true,
                "status": "approved",
                "status_reason": null,
                "value": "0123456"
            },
            {
                "field_name": "director_passport",
                "field_description": "Scanned copy of director's international passport",
                "is_required": true,
                "requires_review_approval": true,
                "status": "pending",
                "status_reason": "Awaiting document reviewer approval",
                "value": "https://cdn.example.com/doc_abc123.pdf"
            },
            {
                "field_name": "proof_of_address",
                "field_description": "Recent utility bill or bank statement as proof of business address",
                "is_required": false,
                "requires_review_approval": false,
                "status": "not_submitted",
                "status_reason": null,
                "value": null
            }
        ]
    }
}