Analytics: Admin-Routen nur auf internem Listener (R5), Transaktion, Duplikat-Check

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

analytics/src/config.js

@@ -2,6 +2,7 @@
 export function loadConfig(env = process.env) {
   return {
     port: Number(env.ANALYTICS_PORT) || 8090,
+    adminPort: Number(env.ANALYTICS_ADMIN_PORT) || 8091,
     dataDir: env.ANALYTICS_DATA_DIR || '/srv/webklar-analytics',
     adminToken: env.ANALYTICS_ADMIN_TOKEN || '',
     heatSecret: env.ANALYTICS_HEAT_SECRET || '',