Adds a new "Aktivitätslog" tab (9th tab) to the supply-side property
drawer. Shows match approvals/rejections, need registrations, data
quality flags, and governance actions linked to this specific property.
Only visible to Verwaltung users in their own property view.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Benjamin Sutter