feat: Art. 26 Joint Controller + DSFA checklists for Social Media sections
New checklists:
- JOINT_CONTROLLER_CHECKLIST (Art. 26 DSGVO, 7 checks):
Joint parties, arrangement, contact point, processing split,
data categories, third-country transfer (USA), rights
- DSFA_CHECKLIST (Art. 35 DSGVO, 5 checks):
Description, necessity, risk assessment, measures, DSB involvement
Section detection: 'Datenschutzerklaerung fuer Social Media' → social_media,
'Datenschutzfolgeabschaetzung/Risikoanalyse' → dsfa
classify_document_type: DSFA and social_media detected before generic DSE
Frontend: DOC_TYPES dropdown + ChecklistView labels updated
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Benjamin Admin
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