feat: Add Phase 11 analytics and production readiness features

- Introduced new endpoints for account overview, analytics, and metrics.
- Implemented authorization matrix and backup/restore documentation.
- Added smoke test script and updated package dependencies.
- Created detailed production checklist and runbook for deployment.
- Established cron operations and notification event matrix documentation.
- Enhanced security and validation audits for analytics and metrics services.
- Added unit tests for analytics and metrics functionalities.

app/routes/accountOverview.routes.js

@@ -0,0 +1 @@
+const r=require("express").Router(),c=require("../controllers/accountOverview.controller"),{authenticate}=require("../middleware/auth.middleware");r.get("/account/overview",authenticate,c.overview);module.exports=r;