Function parser_metadata_v1 

pub fn parser_metadata_v1() -> ArtifactFormat

Standard format for tier-3 parser metadata — facts a parser extracted about a node that are not the node’s primary data payload: source-format identity and version, file-level properties, cross-table dictionaries, creator/tooling provenance. Rides as a second artifact on the parsed node (alongside a tabular_v1 leaf, or on a multi-table container that has no table of its own). Consumed by format, like any artifact; carrying it is useful even with no current consumer (see the tiered-artifact-metadata ADR).