Refactor/phase 9 final#5

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its-hammer-time wants to merge 14 commits intomainfrom

refactor/phase-9-final

Commits on Jan 20, 2026

Implement Radix Tree
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Commits on Feb 7, 2026

validator: introduce pathMatcher chain with radix and regex matchers; consolidate operationForMethod

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validator: define requestContext and buildRequestContext; cache version float

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validator: thread requestContext through sync validation path

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validator: simplify async validation with WaitGroup, thread requestContext

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validator: regex matcher extracts path params into resolvedRoute

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errors: add WithLazyErrors option for deferred schema resolution

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validation: fix per-error overhead; replace regex with string checks

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validator: fix options plumbing ergonomics; minor allocation optimizations

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docs: update architecture review with measured results

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