n8n: surface real per-workflow evidence on the integration status page

Fleet Ops integration status no longer depends only on a config
boolean or the most recent outbox event: N8nIntegrationStatus now
reports per-canonical-workflow evidence (last successful outbox
delivery for the return workflow, latest service-triggered
data_quality_scan_run for the scan workflow, latest
n8n_workflow_failure_registered for the error handler, and "not built"
for the still-blocked RAGcore sync), plus an error-handler summary
(total failures registered, latest failure + which workflow).

Automation page renders this as a localized workflow table (EN/NL/FR)
with technical workflow names tucked under a "Technical details"
disclosure, matching the existing progressive-disclosure pattern.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

frontend/src/i18n/locales/nl-BE/integrations.json

@@ -26,6 +26,28 @@
     "demoMode": "Demomodus",
     "unavailable": "Niet beschikbaar"
   },
+  "workflows": {
+    "title": "Automatiseringsworkflows",
+    "description": "{{known}} van {{expected}} canonieke n8n-workflows hebben actuele evidentie van werking.",
+    "notBuilt": "Nog niet gebouwd",
+    "noEvidence": "Nog geen evidentie",
+    "columns": {
+      "name": "Workflow",
+      "status": "Status",
+      "lastSeen": "Laatste evidentie",
+      "technicalId": "Details"
+    },
+    "names": {
+      "vehicleReturn": "Voertuigretour-orkestratie",
+      "scheduledScan": "Geplande datakwaliteitsscan",
+      "ragcoreSync": "Synchronisatie kennisprocedures",
+      "errorHandler": "Workflowfoutafhandelaar"
+    },
+    "errorHandler": {
+      "summary": "{{count}} automatiseringsfout(en) geregistreerd — laatste van {{workflow}} om {{when}}.",
+      "summaryEmpty": "Er zijn geen automatiseringsfouten geregistreerd."
+    }
+  },
   "ledger": {
     "title": "Automatiseringsopdrachten",
     "description": "Vastgelegde automatiseringspogingen met de recentste foutevidentie.",