Adds the deferred bilateral columns to Plantares (plantare-bilateral.md
§"Schema delta"), all nullable/defaulted so v1 local rows coexist
untouched:
- pledgeId (the shared id both parties key their row by), debtorKey /
creditorKey, debtorSignature / creditorSignature, movementId (the
shared hand-over Movement for the provenance DAG), remoteState
(proposed/accepted/declined — the handshake, distinct from status),
returnKind (similar/workHours/other, default similar) + workHours.
Repo: createPlantare grows optional bilateral params; plantareByPledgeId
looks a row up by the shared id; applyPlantareSignatures counter-stamps
an incoming accept; setPlantareRemoteState records a decline. The
JSON codec carries every new field so they ride backups.
Versioned migration is guarded/idempotent like the others; schema v12
dumped, test helper regenerated, migration test covers v1..v11 → v12.
db + data + services 295/295 green.