Update all configurations, fixtures, scripts, and documentation to replace occurrences of `schon.fureunoir.com` with the new `schon.wiseless.xyz` domain.
This ensures consistency across the project and reflects the updated domain structure.
Includes detailed OpenAPI schemas for unsubscribe (GET and POST) and tracking pixel (GET) endpoints, supporting email compatibility and event tracking. Added support for RFC 8058-compliant one-click unsubscribe functionality and transparent image-based email tracking.
Fixes: 1) Reorder INSTALLED_APPS to place "constance" after "unfold.contrib.constance";
Extra: 1) Update SVG icon for health check; 2) Add missing import for UNFOLD_CONSTANCE_ADDITIONAL_FIELDS; 3) Fix indentation in constance.py.