Phase 4b shipped the walker without plugging it into the cluster
rate.Limiter that processMatches honors. A walker hitting a large
bucket on the recovery branch could burst LifecycleDelete RPCs past
the cluster_deletes_per_second cap that streaming-replay respects.
WalkerDispatcher now takes a *rate.Limiter and waits on it before
each RPC, observing the wait time on S3LifecycleDispatchLimiterWaitSeconds
just like processMatches does. The handler passes the same limiter
to both paths so replay + walk share one budget; nil disables
throttling (unchanged default).
Tests pin: the limiter actually delays a dispatch when the burst
token is drained, and a ctx cancellation in Limiter.Wait surfaces
as an error without sending the RPC.
Chris LuandGitHub
d5372f9eb7