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/src/swagger-ui-dist.d.ts

@@ -1,10 +1,9 @@
-declare module 'swagger-ui-dist/swagger-ui-es-bundle.js' {
-  interface SwaggerUIOptions {
-    url?: string;
-    domNode?: HTMLElement;
-    deepLinking?: boolean;
-    requestInterceptor?: (req: Record<string, unknown>) => Record<string, unknown>;
-    [key: string]: unknown;
-  }
-  export default function SwaggerUI(options: SwaggerUIOptions): void;
+declare module 'swagger-ui-dist' {
+  export function getAbsoluteFSPath(): string;
+  export const SwaggerUIBundle: unknown;
+  export const SwaggerUIStandalonePreset: unknown;
+}
+declare module 'swagger-ui-dist/swagger-ui-bundle' {
+  const SwaggerUIBundle: (config: Record<string, unknown>) => void;
+  export default SwaggerUIBundle;
 }