Dispatch jobs TO or FOR automatic risk assessment?

Both are correct in isolation. It only depends on what you want to say. Depending on the case it could be that what you want to say is well said by both and the only difference is in what aspect of the action you want to emphasize.

Dispatch jobs TO automatic risk assessment.

could be

• treating automatic risk assessment as an entity/system, like a dedicated software framework, or a task, but the phrase is treating them as the destination of the jobs.

Dispatch jobs FOR automatic risk assessment.

could be

• treating automatic risk assessment as a task. An unnamed someone/something will do the automatic risk assessment on those dispatched jobs.
• treating the automatic risk assessment as the intention of the dispatching of the jobs. It might not be what you specifically need to say, but potentially the dispatching of the jobs is part, or one of the steps, of the automatic risk assessment and the phrase is qualifying it as it being with the intention of doing the larger job of automatic risk assessment. So, automatic risk assessment is the purpose of the dispatching.
• treating automatic risk assessment as an entity, but the jobs are dispatched either on their behalf, or as a service/favor to them.