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59cdee749e
Stacks on: - https://github.com/neondatabase/neon/pull/7165 Fixes while working on background optimization of scheduling after a split: - When a tenant has secondary locations, we weren't detaching the parent shards' secondary locations when doing a split - When a reconciler detaches a location, it was feeding back a locationconf with `Detached` mode in its `observed` object, whereas it should omit that location. This could cause the background reconcile task to keep kicking off no-op reconcilers forever (harmless but annoying). - During shard split, we were scheduling secondary locations for the child shards, but no reconcile was run for these until the next time the background reconcile task ran. Creating these ASAP is useful, because they'll be used shortly after a shard split as the destination locations for migrating the new shards to different nodes.