[Backend] — Feature: Add `GET /users/:address/follow-stats` follower and following count

[Olowodarey]

Background

GET /users/:address returns the full user profile without follower/following
counts. Clients that display a "Followers: 142 | Following: 38" badge must make
separate list calls with limit=1 just to get the count. A dedicated lightweight
endpoint is more efficient.

Goal

Add GET /users/:address/follow-stats returning counts only.

Requirements

1. In UsersService, add:

2. Add to UsersController as a @Public() route.

3. Add unit tests in src/users/users.service.spec.ts:

Acceptance criteria

• Public endpoint.
• Returns accurate counts without returning the lists.

[gloskull]

Hello, I have 4 years of experience delivering solutions for projects like this, covering backend, frontend, and smart contract development. After carefully reviewing your requirements, I have a clear understanding of the task and am confident in my ability to deliver a clean, efficient, and thoroughly tested solution on time. I prioritize code quality, maintainability, and industry best practices throughout the development process.
My PR will be submitted in under 10hours.