Fixed-membership POSIX realization. Prepared files are immutable durable
NativeEnvelope publications on the admitted store. The manifest binds their
actual payload digests, not rank/path names. This bounded publisher stages
each shard privately; it is not the hierarchical fleet checkpoint owner.
A store lease keeps referenced files immutable and retained through restore.
23constructor NativeRegionShardOfThe compiler supplied declaration spans and resolved links from this source snapshot. This page does not assert that this file belongs to a checked closure.