docs: add GDPR Data Practices section to About page
Added transparency section documenting Tractatus internal data practices:
- What personal data collected (audit logs: usernames, timestamps, session IDs)
- Why needed (framework governance audit trails)
- Retention policy (configurable, default 90 days)
- User rights (GDPR/DSGVO/RGPD Articles 15, 17, 20)
Architectural principle emphasized: Data minimization as system constraint,
not policy hope. BoundaryEnforcer prevents PII exposure structurally.
Files updated:
- public/about.html: Added "Tractatus Data Practices" section
- public/locales/en/about.json: Added data_practices i18n content
- public/locales/de/about.json: Added data_practices (DSGVO compliance)
- public/locales/fr/about.json: Added data_practices (RGPD compliance)
Compliance: Cultural DNA Refinement 1 (GDPR Consciousness - internal practices)
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Co-Authored-By: Claude <noreply@anthropic.com>
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