API Evangelist enhancements for Ziina API

overlay: 1.0.0
info:
  title: API Evangelist enhancements for Ziina API
  version: 1.0.0
extends: openapi/ziina-openapi.yml
actions:
- target: $.info
  update:
    x-apievangelist-enrichment:
      idempotency: operation_id body field (retry-safe on payment intents and transfers)
      auth: OAuth 2.0 / OIDC (auth.ziina.com/oidc) issuing JWT bearer tokens
      amounts: minor unit of currency_code (fils for AED), minimum 2 AED
      test_mode: pass test=true; see sandbox/ziina-sandbox.yml
      webhooks: HMAC SHA-256 signed (X-Hmac-Signature); events payment_intent.status.updated, refund.status.updated
- target: $.components.securitySchemes
  update:
    oauth2:
      type: oauth2
      description: >-
        Ziina's OIDC-based OAuth 2.0 authorization server. The bearer JWT applied
        across the API is an access token minted here. Documented in
        docs.ziina.com/developers/oauth-2.0 but not declared in the source spec.
      flows:
        authorizationCode:
          authorizationUrl: https://auth.ziina.com/oidc/auth
          tokenUrl: https://auth.ziina.com/oidc/token
          scopes:
            read_account: Read the connected account profile.
            write_payment_intents: Create payment intents and accept payments.
            write_refunds: Create and fetch refunds.
            write_transfers: Transfer money to Ziina users.
            write_webhooks: Register and delete webhook endpoints.
            offline_access: Receive a refresh_token.
- target: $.paths./payment_intent.post
  update:
    x-idempotency:
      field: operation_id
      description: Provide the same operation_id on retries to avoid double-charging.
- target: $.paths./transfer.post
  update:
    x-idempotency:
      field: operation_id
      description: operation_id is required and makes the transfer retry-safe.