#885 decodes XML plists that contain a __proto__ key by omitting those
entries, but signature entitlements and Interface Builder plists dropped
the omission count. inspect_signature returned an entitlement set that
looked complete, and archive_decode stayed complete. Both now report the
omission: a signature limitation, and a partial archive_decode facet with
reason dictionary_entries_omitted and a per-document limitation.
The placeholder that stands in for __proto__ was reserved against the raw
XML text, so an entity-encoded key such as __rea_prototype_key__
decoded to the placeholder and was omitted as if it were __proto__. The
placeholder is now reserved against the decoded text.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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