Add CRUD endpoints for user profiles and patch critical dependency vulnerabilities

[Copilot]

Implements REST API for user profile management and updates vulnerable dependencies (body-parser, debug, ejs, morgan) to patched versions.

User Profile CRUD Endpoints

Added 5 REST endpoints at /api/profiles:

• POST / - Create profile (requires username, email)
• GET / - List all profiles
• GET /:username - Get profile by username
• PUT /:username - Update profile (requires email)
• DELETE /:username - Delete profile

Implementation:

• model/user_profiles.js - Parameterized queries for CRUD operations
• routes/user_profiles.js - Express routes with authentication via check_logged
• model/init_db.js - Creates user_profiles table (username PK, email, full_name, bio, avatar_url)

// Example: Create profile
POST /api/profiles
{
  "username": "jdoe",
  "email": "jdoe@example.com",
  "full_name": "John Doe",
  "bio": "Software engineer"
}

Security Fixes

Updated vulnerable dependencies:

• body-parser: 1.13.2 → 1.20.3 (DoS via URL encoding)
• debug: 2.2.0 → 2.6.9 (ReDoS)
• ejs: 2.4.2 → 3.1.10 (template injection)
• morgan: 1.6.1 → 1.10.1 (code injection)

Added npm overrides to force ejs-locals to use patched ejs version. Reduced total vulnerabilities from 24 to 19.

Original prompt

Create CRUD endpoints for user profiles:

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