Establish `tier` as the source of install-profile + cluster membership
(ADR-894 §4). The registry now derives two views: capabilityClusters
(capId → its skills) and profileMembership (capId → {tier, profiles}, where
profiles is the PROFILE_RANK suffix from the capability's tier). A consistency
gate cross-checks them against the hand-authored PROFILES/CLUSTERS: HARD (throws)
on a capId-matching-a-cluster-name with a different skill set; SOFT
(pending-reconciliation stderr warning, not serialized) when a capability skill
isn't yet in the closure-resolved hand-authored profile.
The SOFT gate loads the real skills manifest and resolves each profile's closure
once so transitively-included skills don't false-warn; warnings are de-duped to
one per (capability, skill); both derived views are scoped to skill-owning
capabilities; serialized with a global capId sort for determinism; reserved-name
guards at every write site; lazy requires of the built constants.
Behavior-preserving: install/surface untouched; derived views consumed by
nothing. Full generation rides along with the phase-6 migration.
Closes#942
Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>
Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>
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