cron: log model+token usage per run + add usage report script

src/gateway/server-cron.ts

@@ -213,6 +213,9 @@ export function buildGatewayCronService(params: {
           runAtMs: evt.runAtMs,
           durationMs: evt.durationMs,
           nextRunAtMs: evt.nextRunAtMs,
+          model: evt.model,
+          provider: evt.provider,
+          usage: evt.usage,
         }).catch((err) => {
           cronLogger.warn({ err: String(err), logPath }, "cron: run log append failed");
         });