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zeekay 49b42a7150 feat(idempotency): extend caller-supplied IdempotencyKey to CreateAccount + CreateCounterparty
Follow-up to v1.1.9 (which threaded IdempotencyKey through CreatePayment +
CreateFXConversion). Adds:

  provider.CreateAccountRequest.IdempotencyKey   string
  types.Counterparty.IdempotencyKey              string

Per-adapter forwarding:
  CreateAccount: column, currencycloud, increase, lithic, moderntreasury,
                 stripe, unit  (7 adapters via doRequestIdem or
                 unique_request_id form field for CC)
  CreateCounterparty: column, currencycloud, moderntreasury, wise (4)

Skipped (provider doesn't support the call):
  mercury     — accounts created dashboard-only
  wise        — same for CreateAccount
  bridge      — counterparty not applicable to chain bridge
  mpesa, square — out of scope (no counterparty API)

Stubs (marqeta, plaid) unaffected — deregistered in v1.1.9.

Empty key → adapter derives via provider.DeriveIdempotencyKey
(SHA-256 over canonical request fields). Same retry → same key.
2026-05-25 09:42:12 -07:00
..