 overdue_send_time - Time of day to send overdue emails (HH:mm:ss) scheduled_at - Timestamp of next scheduled send from server due_date - Backup due date from server (if local data missing) Mission data is enriched with local invoice metadata for complete context: invoice_number - From _invoice_number post meta customer_name - From _invoice_client_name or linked client title customer_email - From _invoice_client_email or linked client meta amount_due - From _invoice_total with Multi-Currency formatting due_date - From _invoice_due_date with WordPress date formatting edit_link - Generated edit URL for invoice client_link - Generated edit URL for linked Portal client (if available) is_invalid - Flag if invoice no longer exists locally type - Recalculated locally: "reminder" or "overdue"