RetryingEmbedder

the embedder whose calls are retried.

total attempts including the first, so 1 disables retrying. Must be positive.

backoff before the second attempt; each further wait multiplies by factor.

ceiling on a single backoff wait, so exponential growth cannot run away.

multiplier applied to the delay after each failed attempt (2.0 doubles it).

fraction of each computed delay that is randomized away, in [0.0, 1.0]. 0.0 waits the exact backoff; the default 0.5 waits a random span in [0.5, 1.0] of it, so a fleet whose calls all failed together does not retry in lockstep and hammer the provider on the same tick.

decides whether a given failure is worth another attempt. Returning false re-throws immediately. CancellationException is excluded before this is ever consulted.