T04: add docs/canon-mapping.md mapping config-atlas concepts to InfoTechCanon
(itc-gov/data/devsecops/land/org/access/sec/tag) and sibling repos with
consume/reference/align/own ownership, plus gaps, validation hooks, and
extension candidates. Resolves the (planned) refs in PRD and ecosystem-boundaries.
T01: add schemas/surface-entry.schema.json (Draft 2020-12, additionalProperties
false to forbid inline values/secrets), docs/configuration-surface-schema.md
(fields, kind taxonomy, L0-L9 ordering, explicit merge rules), a validating seed
entry (surface.infotech.state-hub.api-config), and expand registry/README.md.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
