When a container is deleted but its snapshot survives (dev image rebuild,
containerd metadata loss, manual ctr deletion), the reconciliation path
previously created a fresh container and unconditionally destroyed the
old snapshot via prepareSnapshot, causing complete data loss.
Manager.Start now detects orphaned snapshots before EnsureBot runs,
exports /data to a backup archive, and restores it into the new
container's snapshot before the task starts.
* feat(container): add explicit data workflows and snapshot rollback
Make container upgrades and recreation data-safe by adding explicit preserve, export, import, restore, and rollback flows across the backend, SDK, and web UI.
* fix(container): resolve go lint issues
Fix formatting and lint violations introduced by the container data workflow changes so the Go CI lint job passes cleanly.
Fodesu