fix: revert investigative changes, keep root cause fixes only

Reverts diagnostic instrumentation and defensive hardening added during
memory leak investigation. Only root cause fixes survive.

Root causes fixed:
- SQLite driver: auto-finalize wrapper + PRAGMAs
- WS routers: delete clientConfigVersions on disconnect (unbounded Map leak)
- WS private router: same + Redis key cleanup

Reverted:
- Memory monitor, rate limiting, request timeouts (diagnostic/hardening)
- shutdownAuditLogger wiring, audit re-queue change, debug logs (cleanup/secondary)
- package-lock.json drift

server/cleanup.ts

@@ -3,11 +3,9 @@ import { flushConnectionLogToDb } from "#dynamic/routers/newt";
 import { flushSiteBandwidthToDb } from "@server/routers/gerbil/receiveBandwidth";
 import { stopPingAccumulator } from "@server/routers/newt/pingAccumulator";
 import { cleanup as wsCleanup } from "#dynamic/routers/ws";
-import { shutdownAuditLogger } from "@server/routers/badger/logRequestAudit";
 
 async function cleanup() {
     await stopPingAccumulator();
-    await shutdownAuditLogger();
     await flushBandwidthToDb();
     await flushConnectionLogToDb();
     await flushSiteBandwidthToDb();