Module retry 

Retry logic and streaming fallback handling.

When streaming fails mid-response, the retry handler can:

• Discard partial tool executions with synthetic error blocks
• Fall back to a smaller model on repeated overload errors
• Apply exponential backoff with jitter

Structs

RetryConfig

Retry configuration.

RetryState

State tracker for retry logic across multiple attempts.

Enums

RetryAction

Action the caller should take after a failure.

RetryableError

Categorized error for retry logic.