Siri Vavila - feat(api): backend display user skill radar chart data

[sirisudheeksha]

Description

This PR implements the backend support for the HGN Questionnaire “User Skill Radar Chart” by adding GET /api/userProfile/:userId/skills-radar, which reads the user’s skill data from the Skills Survey collection, normalizes scores to numbers (0–10), excludes the “overall/Overall” aggregate from the axes, and optionally filters by section via ?section=all|frontend|backend (default all). The controller uses a single optimized query with projection for better performance and returns a compact, chart‑ready payload { userId, section, maxScore: 10, skills: [{ name, score }] }.

Related PRS (if any):

N/A
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Main changes explained:

1. src/controllers/userProfileController.js: Added getUserSkillRadarData. It fetches a user’s skills in one query, drops “overall,” converts scores to numbers (0–10), and supports ?section=all|frontend|backend.
2. src/routes/userProfileRouter.js: Added GET /api/userProfile/:userId/skills-radar and mapped it to the controller.

…

How to test:

1. check into current branch

2. Install and run:
   npm install
   Option A (dev): npm run dev
   Option B (dist): rm -rf dist && npm run build && npm start

3. Call the endpoint (replace <USER_ID> with a real id):
   All skills:
   curl -s "http://localhost:4500/api/userProfile/<USER_ID>/skills-radar"
   Frontend only:
   curl -s "http://localhost:4500/api/userProfile/<USER_ID>/skills-radar?section=frontend"
   Backend only:
   curl -s "http://localhost:4500/api/userProfile/<USER_ID>/skills-radar?section=backend"

4. Verify:
   200 OK
   Response shape:
   { "userId": "<USER_ID>", "section": "all|frontend|backend", "maxScore": ... }
   "overall" not present in skills; scores are numeric.

5. Optional negative check:
   Unknown userId → 404 "No skill data found for this user"

Screenshots or videos of changes:

## Note: Include the information the reviewers need to know.

[Anusha-Gali]

Hi Siri Vavila,

I have reviewed your PR locally and the API generated responses as expected.

[sonarqubecloud]

Quality Gate passed

Issues
1 New issue
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud