[v3.2] Automated DPIA report completion

[LEEI1337]

Description

Extend the DPIA module to generate fully automated, submission-ready DPIA reports.

Tasks

• Implement data flow diagram auto-generation
• Add risk assessment scoring
• Generate supervisory authority submission format
• Add template customization per EU member state
• Write validation tests against GDPR Art. 35 requirements

Milestone

This is a v3.2 roadmap feature.