Quality and lineage

Context is trustworthy only when a reader can follow it back to its source. Keep the source record, schema and transformation path, last synchronization time, and validation outcome available to the people and systems that use the result.

Treat a failed quality check, a missing mapping, a stale source, or an expired authorization as a product issue—not a background concern. An agent cannot make a reliable decision from data it was never given or should not trust.