Archiving a Paseo-owned worktree deletes its directory, so reopening its
agent previously dead-ended even after the workspace record came back —
there was no folder to return to.
Restore now recreates the worktree at its original path from the kept
branch (the branch is never deleted on archive), re-points the same
workspace record, and clears archivedAt — preserving the workspaceId so
the agent stays linked. The directory is recreated before the un-archive
so the reconciler can't re-archive it for a missing directory. A deleted
or already-checked-out branch surfaces a typed failure and leaves the
workspace archived.
Gated behind a worktreeRestore capability flag; older hosts get an
explicit "update your host" state instead of a misleading failure.
Mohamed Boudra
b3f81c0bf4