type: string
enum:
  - CARD_TRANSACTION
  - INVOICE
  - REIMBURSEMENT
  - UNKNOWN_DEFAULT_OPEN_API
description: |
  Header (top-level) expense type for filtering purposes.

  **Types:**
  - `CARD_TRANSACTION`: Expenses from card transactions
  - `INVOICE`: Invoice-based expenses
  - `REIMBURSEMENT`: Reimbursement expenses
  - `UNKNOWN_DEFAULT_OPEN_API`: Unknown expense type (fallback for future types)
example: "CARD_TRANSACTION"