CultDocumentRegistry.Owns replaces Declares as the one answer to whether a writer may write, relabel or remove a record under a
schema id: the id is declared, or the type that reads it reads it whole (equal content hash, or compatible shapes with no persisted
slot ignored). Staging asks the declared half or CultStoredDocument.StoredSchemaReadWhole; the apply halves (single file,
directory, cacheless CultMesh) ask Owns over the durable catalog, once per distinct id. A record read only by dropping slots
stays read-only until its id is declared compatible.
Not built or run at this commit: verified on Yggdrasil at the cut's head.
Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
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