Function trace_semconv_fixed_type 

pub(super) fn trace_semconv_fixed_type(
    column_name: &str,
) -> Option<ColumnDataType>

Returns fixed scalar types for flattened trace semconv columns.

The mapping is maintained from the official OpenTelemetry semantic conventions docs under docs/ and docs/registry/attributes/ in: https://github.com/open-telemetry/semantic-conventions/tree/main/docs

Only attributes whose docs mark them as Stable or Release Candidate are included here. Development and lower-stability attributes must keep the dynamic reconciliation path instead.