feat: add verification method, categories, and dedup UI to control library

- Migration 047: verification_method + category columns, 17 category lookup table
- Backend: new filters, GET /categories, GET /controls/{id}/similar (embedding-based)
- Frontend: filter dropdowns, badges, dedup UI in ControlDetail with merge workflow
- ControlForm: verification method + category selects
- Provenance: verification methods, categories, master library strategy sections
- Fix UUID cast syntax in generator routes (::uuid -> CAST)

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

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

@@ -7,7 +7,8 @@ import {
 } from 'lucide-react'
 import {
   CanonicalControl, Framework, BACKEND_URL, EMPTY_CONTROL,
-  SeverityBadge, StateBadge, LicenseRuleBadge, getDomain,
+  SeverityBadge, StateBadge, LicenseRuleBadge, VerificationMethodBadge, CategoryBadge,
+  getDomain, VERIFICATION_METHODS, CATEGORY_OPTIONS,
 } from './components/helpers'
 import { ControlForm } from './components/ControlForm'
 import { ControlDetail } from './components/ControlDetail'
@@ -29,6 +30,8 @@ export default function ControlLibraryPage() {
   const [severityFilter, setSeverityFilter] = useState<string>('')
   const [domainFilter, setDomainFilter] = useState<string>('')
   const [stateFilter, setStateFilter] = useState<string>('')
+  const [verificationFilter, setVerificationFilter] = useState<string>('')
+  const [categoryFilter, setCategoryFilter] = useState<string>('')
 
   // CRUD state
   const [mode, setMode] = useState<'list' | 'detail' | 'create' | 'edit'>('list')
@@ -75,6 +78,8 @@ export default function ControlLibraryPage() {
       if (severityFilter && c.severity !== severityFilter) return false
       if (domainFilter && getDomain(c.control_id) !== domainFilter) return false
       if (stateFilter && c.release_state !== stateFilter) return false
+      if (verificationFilter && c.verification_method !== verificationFilter) return false
+      if (categoryFilter && c.category !== categoryFilter) return false
       if (searchQuery) {
         const q = searchQuery.toLowerCase()
         return (
@@ -86,7 +91,7 @@ export default function ControlLibraryPage() {
       }
       return true
     })
-  }, [controls, severityFilter, domainFilter, stateFilter, searchQuery])
+  }, [controls, severityFilter, domainFilter, stateFilter, verificationFilter, categoryFilter, searchQuery])
 
   // Review queue items
   const reviewItems = useMemo(() => {
@@ -257,6 +262,7 @@ export default function ControlLibraryPage() {
         onEdit={() => setMode('edit')}
         onDelete={handleDelete}
         onReview={handleReview}
+        onRefresh={loadData}
         reviewMode={reviewMode}
         reviewIndex={reviewIndex}
         reviewTotal={reviewItems.length}
@@ -387,6 +393,26 @@ export default function ControlLibraryPage() {
             <option value="too_close">Zu aehnlich</option>
             <option value="duplicate">Duplikat</option>
           </select>
+          <select
+            value={verificationFilter}
+            onChange={e => setVerificationFilter(e.target.value)}
+            className="text-sm border border-gray-300 rounded-lg px-3 py-2 focus:outline-none focus:ring-2 focus:ring-purple-500"
+          >
+            <option value="">Alle Nachweismethoden</option>
+            {Object.entries(VERIFICATION_METHODS).map(([k, v]) => (
+              <option key={k} value={k}>{v.label}</option>
+            ))}
+          </select>
+          <select
+            value={categoryFilter}
+            onChange={e => setCategoryFilter(e.target.value)}
+            className="text-sm border border-gray-300 rounded-lg px-3 py-2 focus:outline-none focus:ring-2 focus:ring-purple-500"
+          >
+            <option value="">Alle Kategorien</option>
+            {CATEGORY_OPTIONS.map(c => (
+              <option key={c.value} value={c.value}>{c.label}</option>
+            ))}
+          </select>
         </div>
 
         {/* Processing Stats */}
@@ -433,6 +459,8 @@ export default function ControlLibraryPage() {
                     <SeverityBadge severity={ctrl.severity} />
                     <StateBadge state={ctrl.release_state} />
                     <LicenseRuleBadge rule={ctrl.license_rule} />
+                    <VerificationMethodBadge method={ctrl.verification_method} />
+                    <CategoryBadge category={ctrl.category} />
                     {ctrl.risk_score !== null && (
                       <span className="text-xs text-gray-400">Score: {ctrl.risk_score}</span>
                     )}