[Feature Request/Enhancement] Retry delay/back off timer

Would be great if command steps can have a retry `wait` parameters, similar to stepfunction or airflow's retry_delay or retry_exponential_backoff https://airflow.apache.org/docs/apache-airflow/stable/_api/airflow/models/baseoperator/index.html

Use case would be to have a `step` poll the completion status of some (external) dependency and dynamically wait & retry till the dependency is ready. Ideally this wait won't consume any agent runtime

Possible & useful? 🤔 💭

Start by tracing how command steps currently handle retries and where step execution consumes agent runtime. Compare the requested behavior with the linked Airflow retry options, then define how wait, retry, and exponential backoff parameters should work for external dependency polling. Done means the behavior and configuration are specified clearly enough to implement and test.

Written by the indexing model from the issue text.