Payment Credit Transactions Summary Retrieve

GET /api/credit-transactions/summary/ GET /payment/credit-transactions/summary/ Get credit balance summary for the organization. Query params (basic mode): None - returns current credit balance Query params (audit mode - superadmin only): - org: Organization UUID (required) - start_time: Start time (ISO 8601, required) - end_time: End time (ISO 8601, required) Response (basic mode): { "current_credit_balance": 150.50 } Response (audit mode): { "organization_uuid": "...", "period_start": "...", "period_end": "...", "log_cost": {...}, "credit_transactions": {...}, "analysis": {...} } Permissions: - Basic mode: Any authenticated user can view their org's balance - Audit mode: Superadmin only