Fetch retry (draft)

[noamr]

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[issacgerges]

👋🏼 Know this is early days but some things I think would be valuable here

• Ability to specify jitter, and maybe a maxDelay clamp (e.g. retry 4×, but stop growing the delay past some ceiling)
• Customizable or standardized retry conditions
  • I could imagine folks will want to retry or not based on specific status code (429/503/5xx) not sure if this is consumer specific or can just be generic
• Honoring Retry-After so client backoff doesn't fight the backend
• A way to observe retries (I can imagine its a useful alertable metric)