feat(analytics): persona logging upgrade and Sentry system config

Add client-logging SDK, expanded event taxonomy, API observability, admin domain events UI, and move SENTRY_DSN to HQ system settings with @sentry/node bootstrap after config preload.

Co-authored-by: Cursor <cursoragent@cursor.com>

server/dukang-api/src/integrations/sentry/sentry.bootstrap.ts

@@ -0,0 +1,14 @@
+import * as Sentry from '@sentry/node';
+
+/** Optional Sentry bootstrap — reads SENTRY_DSN from system_config (preloaded) or .env. */
+export function initSentryIfConfigured() {
+  const dsn = process.env.SENTRY_DSN?.trim();
+  if (!dsn) return;
+
+  Sentry.init({
+    dsn,
+    environment: process.env.NODE_ENV ?? 'development',
+    tracesSampleRate: process.env.NODE_ENV === 'production' ? 0.1 : 0.2,
+  });
+  console.log('[sentry] initialized');
+}