Add configurable history and storage retention policies

src/lib/server/maintenance/runtime.ts

@@ -120,9 +120,7 @@ async function runTick(): Promise<void> {
         try { await processJob(job); }
         catch { hold(job, 'Maintenance check failed; waiting for the next check.'); }
     }
-    // Update attempts are also durable suppression evidence; never age them into an automatic retry.
-    db().prepare(`DELETE FROM maintenance_jobs WHERE kind != 'update' AND finished_at < ? AND state IN ('done','failed','cancelled')`)
-        .run(new Date(Date.now() - 30 * 24 * HOUR).toISOString());
+
 }
 async function processJob(job: MaintenanceJob): Promise<void> {
     const server = getServer(job.server);