RepaymentFailedWebhook

{
    "event": "repayment.failed",
    "event_id": "evt_rp_failed_20260407_001",
    "timestamp": "2026-04-07T14:30:00.000Z",
    "marketplace": {
        "id": "mkt_live_abc123def456",
        "name": "Jumia Nigeria"
    },
    "merchant": {
        "marketplace_id": "PLT_MERCH_001",
        "opensylo_id": "mch_a1b2c3d4-e5f6-7890-abcd-ef1234567890"
    },
    "loan": {
        "opensylo_id": "loan_f1e2d3c4-b5a6-7890-1234-567890abcdef",
        "opensylo_reference": "OSL-2026-00142"
    },
    "failure": {
        "reference": "FAIL-20260407-001",
        "attempted_amount": 5000,
        "reason": "Insufficient sale amount for deduction",
        "code": "INSUFFICIENT_BALANCE",
        "attempted_at": "2026-04-07T14:30:00.000Z"
    },
    "source_transaction": {
        "id": "ORD-2026-00543",
        "type": "sale",
        "gross_amount": 50000,
        "timestamp": "2026-04-07T14:25:00.000Z"
    }
}