Decreasing delay between purges.

src/db-admin/health-legacy.ts

@@ -190,7 +190,7 @@ export const watchDbLegacy = async () => {
         });
         let i = 0;
         for (const doc of deletedDocs) {
-          await sleep(50);
+          await sleep(10);
           try {
             await db.purge(doc.id, doc.rev);
           } catch (err) {