Changes

#	Step	Field	From	To	Why
22,084	bootstrap_labels	prefLabel	—	[{"@value":"Cu-HDO","@language":"en","source":{"prov:wasGeneratedBy":"bootstrap_labels","prov:wasAttributedTo":"brightw…	Bootstrapped prefLabel from legacy name field
22,085	bootstrap_labels	name	Cu-HDO	—	Purged legacy name field to enforce prefLabel usage
22,086	bootstrap_labels	synonyms	["Bis-(N-cyclohexyldiazeniumdioxy)-copper"]	[]	Removed legacy synonyms field in favor of structured labels
81,169	default_context_mapping	context	—	{"dimension":"Environmental","media":"Water","water_body":"Unknown"}	Mapped from context mapping for source=EF 3.1, source context Emissions > Emissions to water > Emissions to water, unspecified
81,170	default_context_mapping	context_iri	—	https://vocab.brightway.one/flow-contexts/envi-wate-unkn	Mapped from context mapping for source=EF 3.1, source context Emissions > Emissions to water > Emissions to water, unspecified
220,396	unit_normalization	unit_iri	—	https://vocab.brightway.one/units/unit/KiloGM	Unit IRI set from normalization of 'kg'
247,257	enrich_references	skos_definition	—	[]	Merged ChEBI/PubChem definitions into skos:definition
247,258	enrich_references	references	[]	[{"@id":"https://commonchemistry.cas.org/detail?cas_rn=312600-89-8","provenance":{"prov:wasGeneratedBy":"enrich_referen…	Added references with provenance; cas_numbers=['312600-89-8']; matched_chebi_ids=[]; candidate_pubchem_cids=[]; selected_pubchem_cids=[]; formula_similarity_expected=[]; pubchem_selection_rule=curated_cas_then_formula_similarity_then_prefer_chebi_aligned_when_unambiguous_else_keep_all_cas_matches; single_cas_commonchem_link=yes
265,355	consensus_match	cas_match_labels	—	{"312600-89-8":"exactMatch"}	group_key=cu-hdo\|\|dimension=Environmental > media=Water > water_body=Unknown; group_sources=[]; cas_sources={'312600-89-8': []}; assigned CAS labels from group consensus; object_uuid=fo-c796916f9257775d: {'312600-89-8': 'exactMatch'}
321,638	carry_associations_onto_flows	concept_associations	[]	[{"@type":"xkos:ConceptAssociation","xkos:sourceConcept":{"@id":"https://vocab.brightway.one/ef/3.1/flow/42d75c09-83a4-…	associations resolved on the elementary layer
402,873	link_flows_to_their_substance	types	—	["https://w3id.org/chemrof/ImpreciseChemicalMixture"]	the substance's answer, copied onto its flow