/onboardings/individual

Starts the Online Onboarding flow for an account in awaiting_information. Provide the accountId from POST /accounts/individual; other fields are optional and can be collected in the hosted flow. Some fields may be prefilled for the user. The flow links KYC to the account, validates identity data, assesses AML/PEP risk, verifies legal eligibility, and captures project intent. Redirect occurs to redirectUrl on success or failure.