Fix some validation edge cases due to over optimisations in validate --fast

[jviotti]

Signed-off-by: Juan Cruz Viotti jv@jviotti.com

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No issues found across 7 files

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🤖 Augment PR Summary

Summary: This PR updates the vendored Blaze dependency and fixes validation edge-cases introduced by aggressive validate --fast optimizations, primarily around Draft 3 object-closure and disallow handling.

Changes:

• Bumps the Blaze vendor revision and adjusts the Draft 3 canonical meta-schema to better model `extends` and `type`-union nodes.
• Adds a new alter-schema canonicalizer rule, DisallowDoubleNegation, to collapse nested single-element disallow chains (double negation) when it’s safe with respect to references.
• Fixes a fast-mode compiler lifetime issue by ensuring concatenated schema pointers outlive the temporary SchemaContext that references them.
• Introduces properties_enforce_closed_object and refines the additionalProperties: false fast-path so closure is not incorrectly skipped for the “single required property” case.
• Tightens post-processing so “property type assertion” conversions only happen when the instance-location path consists solely of object-property tokens (avoids misclassification for array-index paths).

Technical Notes: The intent is to preserve correctness while keeping the fast validator’s closure-elision optimizations when they are provably redundant.

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vendor/blaze/src/alterschema/canonicalizer/disallow_double_negation.h:68 — schema.merge(inner.as_object()) will overwrite any existing wrapper-node members with the inner schema’s members; if the wrapper carries location-affecting keywords (e.g., id), collapsing the negation chain could unintentionally change reference resolution/identifiers.

Severity: medium

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