feat: Enable GORM database query logging

[Starosdev]

Summary

Enable GORM database query logging for improved debugging capabilities.

Why

Database query logging is currently disabled with a TODO comment. Enabling it would help debug database-related issues.

File

webapp/backend/pkg/database/scrutiny_repository.go (line 81)

//TODO: figure out how to log database queries again.

Acceptance Criteria

• GORM logger configured and enabled
• Log level configurable (e.g., only in debug mode)
• No performance impact in production
• Documentation updated if needed