Wire: reserve DesiredVM field 9 (persistent) now the fleet is past v0.0.5

open   by a73x

Labels: backlog

[claude 2026-08-18] proto/eitri/v1/sync.proto:157 still carries `bool persistent = 9`
with the comment explaining it cannot be reserved yet: v0.0.5 agents strand guests
when the field is absent, so the number could only be reserved once no v0.0.5 agent
can exist. v0.0.7 is live on the plane and on onyx; the remaining v0.0.6 host is
Squirtle.local, parked. Once the version floor makes a v0.0.5 agent impossible,
drop the field and `reserved 9; reserved "persistent";`.
Pairs with the ballast left in the store: the persistent column's dropColumn was
turned into ensureColumn rollback ballast (4dc88c5) with the real drop deferred to
this cleanup.