test(security): add security tests for various endpoints

[derevnjuk]

Description

• Added security tests to ensure the robustness of the application against common vulnerabilities.

Test Plan

• Validate security tests by running the test suite and ensuring all tests pass.
• Review the test cases to confirm they cover the necessary security aspects.

Endpoints Tested

• GET /api/articles
• GET /api/articles/feed
• GET /api/articles/{slug}
• POST /api/articles
• PUT /api/articles/{slug}
• DELETE /api/articles/{slug}
• POST /api/articles/{slug}/favorite
• DELETE /api/articles/{slug}/favorite
• GET http://localhost:3000/api/articles/example-article/comments
• POST http://localhost:3000/api/articles/example-article/comments
• DELETE http://localhost:3000/api/articles/example-article/comments/1
• GET /api/profiles/johndoe
• POST /api/profiles/johndoe/follow
• DELETE /api/profiles/johndoe/follow
• POST /sentiment/score
• GET http://localhost:3000/tags
• POST http://example.com/api/users/login
• POST http://example.com/api/users
• GET http://example.com/api/user
• PUT http://example.com/api/user

Security Checks Included

• SQL injection
• XSS vulnerabilities
• Authentication bypass