Implement Structured Logging (JSON) for Production

**Is your feature request related to a problem? Please describe.**

Currently, application logs are output in plain text format which is ok for local but difficult to read and query in prod environments.
Like we can search for all reqs with latency > 500ms, grouping errors, and beyond.

**Describe the solution you'd like**

I propose implementing structure logging JSON for prod environment using "structlog."

**Are you going to work on implementing this?**

- [x] Yes
- [ ] No