Add provenance feature
- lookup for individual objects (first occurrence + pagination for all occurrences),
- breakdown for composed objects (BOM).
Migrated from T2193 (view on Phabricator)
Migrated from T2193 (view on Phabricator)
marked this issue as related to swh-web#2190
added Provenance database Roadmap 2020 priority:Normal labels
marked this issue as related to #3112