Implement SQL Injection Prevention & Security Hardening

Ticket ID: SEC-SQL-INJECTION-001
Priority: CRITICAL
Security Level: MAXIMUM

**Feature Description**

Implement comprehensive SQL injection prevention measures across all database interactions. Secure Sequelize ORM usage, validate all user inputs, and implement security middleware to protect against SQL injection attacks.

**Acceptance Criteria**

1. Sequelize Security Configuration ✅

- Enable parameterized queries in all Sequelize configurations

- Set logging: false in production or sanitize SQL logs

- Implement query validation middleware for raw SQL queries

- Configure type validation for all model attributes

2. Raw Query Protection ✅

- BAN raw SQL queries unless absolutely necessary

- Required approval process for any raw SQL usage

- All raw queries MUST use parameterized queries with ? or $1 placeholders

3. Security Headers & Middleware ✅
```
javascript

// Implement security middleware
app.use(helmet()); // Security headers
app.use(xss()); // XSS protection
app.use(sanitizeSql()); // Custom SQL injection prevention
```

4. Monitoring & Detection ✅

- Log all SQL queries with suspicious patterns

5. Documentation ✅

- Create a security docs folder and draft a detailed sql_injection.md file explaining the overall strategy

🚀 Success Metrics

ZERO successful SQL injection attacks

< 0.01% false positives in input validation

All developers trained on secure coding practices