fix+test+docs: Archivierte Projekte, Vitest-Tests & Regulations-Doku

- fix(ProjectSelector): Archivierte Projekte anklickbar machen, doppelten
  "Neues Projekt" Button entfernen
- test: 32 Vitest-Tests fuer scope-to-facts und supervisory-authority-resolver
- docs(flow-data): Scope-Step outputs + Obligations inputs erweitert
- docs(developer-portal): Feature-Highlight "Automatische Regulierungs-Ableitung"
- docs(mkdocs): Neuer Abschnitt Regulierungs-Ableitung in obligations.md

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

admin-compliance/components/sdk/ProjectSelector/ProjectSelector.tsx

@@ -482,7 +482,6 @@ export function ProjectSelector() {
   }
 
   const handleProjectClick = (project: ProjectInfo) => {
-    if (project.status === 'archived') return // archived projects are read-only in list
     router.push(`/sdk?project=${project.id}`)
   }
 
@@ -598,26 +597,6 @@ export function ProjectSelector() {
         </div>
       )}
 
-      {/* No active but has archived */}
-      {!loading && projects.length === 0 && archivedProjects.length > 0 && (
-        <div className="text-center py-12 mb-6">
-          <h2 className="text-lg font-semibold text-gray-900">Keine aktiven Projekte</h2>
-          <p className="mt-2 text-gray-500">
-            Sie haben {archivedProjects.length} archivierte{archivedProjects.length === 1 ? 's' : ''} Projekt{archivedProjects.length === 1 ? '' : 'e'}.
-            Stellen Sie ein Projekt wieder her oder erstellen Sie ein neues.
-          </p>
-          <button
-            onClick={() => setShowCreateDialog(true)}
-            className="mt-4 inline-flex items-center gap-2 px-6 py-3 bg-purple-600 text-white rounded-lg hover:bg-purple-700 transition-colors font-medium"
-          >
-            <svg className="w-5 h-5" fill="none" stroke="currentColor" viewBox="0 0 24 24">
-              <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M12 6v6m0 0v6m0-6h6m-6 0H6" />
-            </svg>
-            Neues Projekt erstellen
-          </button>
-        </div>
-      )}
-
       {/* Archived Projects Section */}
       {!loading && archivedProjects.length > 0 && (
         <div className="mt-8">