🛂 feat : added oauth2 implementation

[dev-madhurendra]

📦 Pull Request

📌 Description

Fixes #

🧩 Type of Change

Please delete options that are not relevant.

• 🐛 Bug fix
• ✨ New feature
• ♻️ Code refactor
• 🧪 Test addition/changes
• 📝 Documentation update
• 🚀 Performance improvement
• 🔧 Build/deployment changes
• ⚠️ Breaking change

✅ Checklist

• I have followed the project's coding standards
• I have tested the changes locally
• All dependent packages are updated (if needed)
• I have added or updated relevant documentation/comments
• I have added tests that prove my fix is effective or that my feature works
• All new and existing tests passed
• I have linked the related issue (if applicable)

🧪 How to Test

1. Start backend server
2. Run frontend with npm run dev
3. Test /api/barber/token endpoint manually or using Postman
4. [Optional] Check console logs or database

📸 Screenshots / Video

🔍 Review Notes

• Focus on validation logic in BarberTokenController
• Ensure role-based access is working correctly

🚨 Breaking Changes?

• Yes (please describe below)
• No

If yes, please describe:

📚 Additional Context

[sonarqubecloud]

Quality Gate failed

Failed conditions
12.9% Coverage on New Code (required ≥ 80%)

See analysis details on SonarQube Cloud

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
100.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud