#523 - TypeScript hardening for runtime-critical path

[brijesh-amin]

Parent: #523

Objective

Increase type safety where failures are most costly by removing @ts-nocheck and tightening types in bootstrap/router/auth entry paths.

In scope

• Prioritize: src/index.ts, src/router/index.ts, src/libs/authmware.ts (and directly related helpers)
• Remove @ts-nocheck in targeted files
• Add/adjust types for request context, auth payloads, and shared utilities

Acceptance criteria

• Target files compile without @ts-nocheck
• No behavior regressions in auth + route bootstrap
• Unit/integration tests pass for touched paths
• New/changed code avoids broad any where practical

Notes

Work in small PRs to keep review manageable.