fix(types): validate fixed type length#1404
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Why
fixed[N]schemas should only allow a positive fixed byte length, but the parser and constructor path currently allowed invalid lengths through. That could leak malformed type definitions into metadata and fail later in conversion/encoding paths.What changed
FixedTypeOfnow rejects non-positive lengths.fixed(<length>)declaration using the same checks, sofixed[0]and invalid forms are rejected immediately.Validation
go test . -run "TestFixedType|TestFixedTypeInvalidParse" -count=1go run github.com/golangci/golangci-lint/v2/cmd/golangci-lint@v2.11.4 run --timeout=10m