Initial tries for handling retries

[Spatika-Ganesh]

ref: https://linear.app/workflowai/issue/WOR-640/handle-429-retries-in-python-sdk

[linear]

WOR-640 Handle 429 retries in Python SDK

anya pierre for scheduling

Add an argument to the run function that gracefully handles 429.

Requires WOR-114 to understand when to retry

The backend now returns proper error status codes + detailed error messages. When the retry-after header is provided in a request, we should automatically retry client side.

The feature is already implemented in the TS SDK. See https://github.com/workflowai/workflowai-js/blob/main/packages/api/src/utils/retriableFetch.ts

• add `max_retry_delay` and `max_retry_count` as an argument to the `run` function, defaults should match the TS SDK values
• automatically retry a run call if the `retry-after` header is present in the response and if the retry conditions are met.