feat: Eigenentwicklung-Filter im Typ-Dropdown mit Counts

Backend: control_type=eigenentwicklung in list_controls + count_controls,
type_counts (rich/atomic/eigenentwicklung) in controls-meta Endpoint.
Frontend: Typ-Dropdown zeigt Eigenentwicklung mit Anzahl.

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

admin-compliance/app/sdk/control-library/page.tsx

@@ -27,6 +27,11 @@ interface ControlsMeta {
   domains: Array<{ domain: string; count: number }>
   sources: Array<{ source: string; count: number }>
   no_source_count: number
+  type_counts?: {
+    rich: number
+    atomic: number
+    eigenentwicklung: number
+  }
 }
 
 // =============================================================================
@@ -743,8 +748,9 @@ export default function ControlLibraryPage() {
               className="text-sm border border-gray-300 rounded-lg px-2 py-1.5 focus:outline-none focus:ring-2 focus:ring-purple-500"
             >
               <option value="">Alle Typen</option>
-              <option value="rich">Rich Controls</option>
-              <option value="atomic">Atomare Controls</option>
+              <option value="rich">Rich Controls{meta?.type_counts ? ` (${meta.type_counts.rich})` : ''}</option>
+              <option value="atomic">Atomare Controls{meta?.type_counts ? ` (${meta.type_counts.atomic})` : ''}</option>
+              <option value="eigenentwicklung">Eigenentwicklung{meta?.type_counts ? ` (${meta.type_counts.eigenentwicklung})` : ''}</option>
             </select>
             <span className="text-gray-300 mx-1">|</span>
             <ArrowUpDown className="w-4 h-4 text-gray-400" />