<type>(<scope>): <description>

[optional body]

[optional footer(s)]

# Feature
feat(auth): add OAuth2 login with Google provider

- Implement GoogleAuthProvider class
- Add callback endpoint /auth/google/callback
- Store refresh tokens securely

Closes #123

# Bug fix
fix(api): handle null response in user service

The getUserById method was throwing when user not found.
Now returns null and lets caller handle the case.

Fixes #456

# Breaking change
feat(api)!: change response format for pagination

BREAKING CHANGE: Pagination now uses cursor-based format.
Old: { page, limit, total }
New: { cursor, hasMore, items }

# Feature branches
feature/user-authentication
feature/JIRA-123-add-payment-gateway

# Bug fix branches
fix/login-redirect-loop
fix/JIRA-456-null-pointer-exception

# Hotfix branches
hotfix/security-patch-xss

# Release branches
release/v1.2.0

## Summary
Brief description of changes

## Changes
- Added UserAuthService with JWT support
- Created login/register API endpoints
- Added password hashing with bcrypt

## Testing
- [ ] Unit tests pass
- [ ] Integration tests pass
- [ ] Manual testing completed

## Screenshots (if UI changes)
[Add screenshots here]

## Related Issues
Closes #123
Related to #456

# Interactive rebase last 3 commits
git rebase -i HEAD~3

# Squash commits
git rebase -i HEAD~N  # then change 'pick' to 'squash'

# Undo last commit (keep changes)
git reset --soft HEAD~1

# Cherry-pick specific commit
git cherry-pick <commit-hash>

# Stash with message
git stash push -m "WIP: feature description"