Add sample projects: English and Spanish demos with full reporting

[neyec]

Summary

• Two sample projects seeded on user registration: one in English ("Facial Recognition Access Control") and one in Spanish ("Control de Acceso por Reconocimiento Facial")
• 568 pre-filled reporting evidence entries per project covering all three compliance frameworks:
  • EU AI Act (355 entries across 12 areas: cybersecurity, documentation, QMS, incidents, risk management, data governance, accuracy, records, robustness, oversight, transparency, surveillance)
  • UNDP Human Rights Assessment (161 entries across 9 phases)
  • Environmental Impact Framework (52 entries across 6 areas)
• All evidence is specific to the facial recognition access control use case, concrete and verifiable

Test plan

• Register a new user account
• Verify two sample projects appear in the project list (EN + ES)
• Open the English project's reporting page and confirm all checklist items have pre-filled evidence
• Open the Spanish project's reporting page and confirm all checklist items have Spanish evidence
• Verify evidence appears across all three framework tabs (EU AI Act, UNDP, Environmental)
• Confirm existing users are unaffected (no new projects added retroactively)

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