Manually run one bounded, tenant-explicit outbound payload prune batch.
This is the universal operational path: it works whether or not Oban is
installed, and calls the same Mailglass.Outbound.PayloadPruner.prune/1
function as the optional scheduled worker.
Usage
mix mailglass.outbound.payloads.prune --tenant TENANT_ID--tenant is required. The task never defaults or enumerates tenants. Its
output contains aggregate lifecycle state and reason counts only.