swh-journal: The schema migration problem
As per the database, each schema modification begs the question of data migration... (recently the change from occurrence to snapshot, the snapshot naming convention change, the release question, etc...).
We will double this issue for the journal...
Possible solutions:
- message versioning
- multiple topics for the same object (+ deprecation date of the old topics)
Migrated from T1279 (view on Phabricator)