Simulate a counterparty deposit​

Added POST /api/v1/simulation/counterparties/:counterpartyId/deposits for development, sandbox, and local environments.

This simulates an incoming bank deposit into a counterparty's Accrue deposit account so you can credit the counterparty without sending a real ACH or wire. The request returns 204 when accepted; the counterparty balance updates asynchronously after the incoming payment is processed.

The counterparty must already have an Accrue deposit account (internalBankAccount on the counterparty resource). Requests against counterparties without one return 400.