feat(compliance): add DORA (EU 2022/2554) framework with ATT&CK mappings

Implements the Digital Operational Resilience Act as a compliance framework
using the same pattern as CIS Controls v8 (hardcoded curated mappings,
no official STIX bundle exists for DORA).

22 controls across 5 chapters mapped to MITRE ATT&CK techniques:
  Ch. II  — ICT Risk Management (Art. 5–15): governance, identification,
            protection, detection, response, backup, threat intel
  Ch. III — Incident Management (Art. 17–19): classification, reporting
  Ch. IV  — Resilience Testing (Art. 24–27): general testing + TLPT
            (Art. 26 explicitly based on TIBER-EU/ATT&CK threat-led testing)
  Ch. V   — Third-Party Risk (Art. 28, 30, 42): supply chain, trusted rels.
  Ch. VI  — Information Sharing (Art. 45)

Technique mappings derived from ENISA DORA guidelines and TIBER-EU framework.
Import is triggered via POST /api/v1/compliance/import/dora (admin only).
Frontend: new 'DORA' button in the Compliance page import section.

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

frontend/src/pages/CompliancePage.tsx

@@ -7,6 +7,7 @@ import {
   downloadComplianceCSV,
   importNistMappings,
   importCisMappings,
+  importDoraMappings,
   type ComplianceFrameworkSummary,
 } from "../api/compliance";
 import { useAuth } from "../context/AuthContext";
@@ -81,7 +82,15 @@ export default function CompliancePage() {
     },
   });
 
-  const isImporting = importNist.isPending || importCis.isPending;
+  const importDora = useMutation({
+    mutationFn: importDoraMappings,
+    onSuccess: () => {
+      queryClient.invalidateQueries({ queryKey: ["compliance-frameworks"] });
+      queryClient.invalidateQueries({ queryKey: ["compliance-status"] });
+    },
+  });
+
+  const isImporting = importNist.isPending || importCis.isPending || importDora.isPending;
 
   if (isLoading && !frameworkStatus) {
     return (
@@ -215,10 +224,18 @@ export default function CompliancePage() {
             {importCis.isPending ? <Loader2 className="h-3 w-3 animate-spin" /> : <Plus className="h-3 w-3" />}
             CIS Controls v8
           </button>
-          {(importNist.isSuccess || importCis.isSuccess) && (
+          <button
+            onClick={() => importDora.mutate()}
+            disabled={isImporting}
+            className="flex items-center gap-1.5 rounded-lg border border-gray-700 bg-gray-800 px-3 py-1.5 text-xs font-medium text-gray-300 hover:border-cyan-500/50 hover:text-white transition-colors disabled:opacity-50"
+          >
+            {importDora.isPending ? <Loader2 className="h-3 w-3 animate-spin" /> : <Plus className="h-3 w-3" />}
+            DORA
+          </button>
+          {(importNist.isSuccess || importCis.isSuccess || importDora.isSuccess) && (
             <span className="text-xs text-green-400">Import complete</span>
           )}
-          {(importNist.isError || importCis.isError) && (
+          {(importNist.isError || importCis.isError || importDora.isError) && (
             <span className="text-xs text-red-400">Import failed</span>
           )}
         </div>