feat: migrate UI to @cameleer/design-system, add backend endpoints

Backend:
- Add agent_events table (V5) and lifecycle event recording
- Add route catalog endpoint (GET /routes/catalog)
- Add route metrics endpoint (GET /routes/metrics)
- Add agent events endpoint (GET /agents/events-log)
- Enrich AgentInstanceResponse with tps, errorRate, activeRoutes, uptimeSeconds
- Add TimescaleDB retention/compression policies (V6)

Frontend:
- Replace custom Mission Control UI with @cameleer/design-system components
- Rebuild all pages: Dashboard, ExchangeDetail, RoutesMetrics, AgentHealth,
  AgentInstance, RBAC, AuditLog, OIDC, DatabaseAdmin, OpenSearchAdmin, Swagger
- New LayoutShell with design system AppShell, Sidebar, TopBar, CommandPalette
- Consume design system from Gitea npm registry (@cameleer/design-system@0.0.1)
- Add .npmrc for scoped registry, update Dockerfile with REGISTRY_TOKEN arg

CI:
- Pass REGISTRY_TOKEN build-arg to UI Docker build step

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

ui/package.json

@@ -5,21 +5,20 @@
   "type": "module",
   "scripts": {
     "dev": "vite",
-    "build": "tsc -b && vite build",
+    "build": "tsc -p tsconfig.app.json --noEmit && vite build",
     "lint": "eslint .",
     "preview": "vite preview",
     "generate-api": "openapi-typescript src/api/openapi.json -o src/api/schema.d.ts",
     "generate-api:live": "curl -s http://localhost:8081/api/v1/api-docs -o src/api/openapi.json && openapi-typescript src/api/openapi.json -o src/api/schema.d.ts"
   },
   "dependencies": {
+    "@cameleer/design-system": "^0.0.1",
     "@tanstack/react-query": "^5.90.21",
     "openapi-fetch": "^0.17.0",
-    "panzoom": "^9.4.3",
     "react": "^19.2.4",
     "react-dom": "^19.2.4",
     "react-router": "^7.13.1",
     "swagger-ui-dist": "^5.32.0",
-    "uplot": "^1.6.32",
     "zustand": "^5.0.11"
   },
   "devDependencies": {