Root cause is device firmware contact table being empty (after reflash
or reset), not the v1→v2 migration itself. DB retains hundreds of
contacts from advert history but device only has those explicitly added.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Documents breaking changes including the need to re-add DM contacts
to the device firmware table after migration.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>