Add POST /notifications/run-all: runs the four notification jobs (outstanding, payment confirmation, account status, trust confirmation) sequentially with one shared set of flags from "Flags del envío". Sequential rather than parallel — the jobs share the SES transport and account status can self-throttle via useEmailLimit. A job that throws is captured and the sweep continues, so one bad query cannot swallow the other three envíos; the aggregate response carries per-job results plus summed sent/skipped/failed and an errors count. Audited as a single notification.run-all.run entry so one staff click is one audit row. UI adds the button to the flags card, with a confirm when debug is off, and a per-job summary in "Última respuesta".