A7. Data Lineage Records End-to-end provenance chain tracing raw data sources through every transformation to the features used in training and inference. Column-level lineage captures indirect relationships. Captured automatically as pipeline components emit lineage events through OpenLineage with Marquez, or equivalent. Retained for the full ten-year period. Responsible party: Automated pipeline generates. Technical SME configures the lineage framework. Regulations addressed: Article 10 (data governance); Article 12 (record-keeping); GDPR Articles 15–17 (data subject rights); Article 18 (ten-year retention). Key outputs

• Per-pipeline-run column-level lineage graph