Restart many workflow executions

"Re-run all failed", in one call. EVERY NODE RUNS AGAIN.

Not a resume: a restart begins at the start, so nodes that already succeeded run a second time - including anything that sent a message, called an API or spent credits the first time.

Voice applies a 60-second idempotency window to this route, so an accidental double-submit inside that window does not double-run the batch. Send an Idempotency-Key header as well for the app-wide guard.

Every execution in the batch is scoped to the caller's org before it is touched; ids belonging to another tenant are simply not found.

A restart runs each workflow as it is NOW. When one has record steps or a record trigger, the key needs the object scopes they exercise (403 missing_scopes refuses the whole batch, nothing restarts), and only the workflow's owner or a graph8 admin may restart it: for any other member that item is reported in failed with owner_or_admin_required while the rest of the batch goes ahead. When graph8 cannot confirm who is an admin, that item is refused, never guessed, and also reported in failed.