vanvalenlab / kiosk-redis-consumer / 790

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Change Storage client to use exponential backoff. (#107)

* use exponential backoff for retrying storage errors.

removes support for Storage.backoff, and instead each retry calls get_backoff(attempts), which calculates the exponential backoff for the given attempt number.

* set default max_backoff based on settings.STORAGE_MAX_BACKOFF, a new env var.

* include the UUID in file upload path to prevent 429s on the same object.

* TrackingConsumer: put UUID in beginning of filepath and use same UUID for each frame of a tiff stack.

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