The two monolithic XSD content/identity rules only satisfied the OpenAPIKit
validation idiom at the wrong granularity: no per-constraint removability,
no isolable failing/near-miss tests. Split them into 32 named rules, each
finding tagged at its origin and cached per XSDContext so the walk still
runs once per document (the #101 decision against duplicating XSD's
recursive type resolution still holds). Wired the streaming path's ID/IDREF
and identity checks through the same framework instead of calling the
validators imperatively, and added the unwrapAndLookup combinator the rule
already named as required.
Also includes the mandated repo-wide swiftformat/swiftlint pass.
Particle Valid (Restriction) derives its pairwise check over the spec's
normalized content model: pointless particles are eliminated (maxOccurs=0
members dropped, a {1,1} single-member group unwrapped, a nested
same-compositor {1,1} group spliced), all language-preserving. The outer
occurrence-range check was wrongly applied to the cross-kind pairings, where
it compares a derived particle's own range against a base group's or
wildcard's. It is now applied only to the same-kind pairings (element/element,
wildcard/wildcard, group/group) and element/wildcard; element/group
(RecurseAsIfGroup), group/element, and group/wildcard match occurrence inside
the case, against a member or as an effective total range.
A group restricting a wildcard (NSRecurseCheckCardinality) is valid when every
leaf is admitted and the effective total occurrence range is within the
wildcard's; a group restricting a single element is bounded the same way, by
that element's name, type derivation, and occurrence range.
XSTS: valid schemas rejected 45 to 32, invalid schemas accepted 528 to 526,
no other bucket raised.
