True when an association is known but its system or attributes cannot
be fully resolved: missing source bytes (#3948), a broken chain, or a
cycle (#5290). Known leaf attributes can remain on a partial entry.
Distinguishes "classified but unresolved" from "genuinely unclassified"
(an empty result array), which are otherwise byte-identical to every
caller. A graph-only marker has no other fields.
With live edits on a source-empty store these markers retain immutable
source evidence; edited source membership needs the original bytes and
must not be counted as a known current population.
True when an association is known but its system or attributes cannot be fully resolved: missing source bytes (#3948), a broken chain, or a cycle (#5290). Known leaf attributes can remain on a partial entry. Distinguishes "classified but unresolved" from "genuinely unclassified" (an empty result array), which are otherwise byte-identical to every caller. A graph-only marker has no other fields. With live edits on a source-empty store these markers retain immutable source evidence; edited source membership needs the original bytes and must not be counted as a known current population.