Converts the open question into a closed decision. Rationale: consumer
ergonomics on the combined validate_json + validate_bytes path — one
uniform payload type means one match arm downstream. Option 2
(Validation(String)) would force validate_json to flatten its
structured errors to a String, losing information on the richer path to
accommodate the less rich one. The no_std/minimal-build angle that
option 2 was meant to enable is moot: validate_json requires jsonschema
regardless, so a bytes-only no_std build already has to give up
validate_json as a separate larger decision; dropping the type from one
error variant doesn't unlock it.
Updates Phase 1 step 5 to reference D-BAST-009 for the error
construction pattern, and rewrites POC Result observation 4 from
'deferred decision' to 'decided — see D-BAST-009'.
No semver-relevant change to the Validation variant. Doc-only.
glm-5.2
89f05850f2