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/api/queries/admin/database.ts

@@ -1,20 +1,22 @@
-import { useMutation, useQuery, useQueryClient } from '@tanstack/react-query';
+import { useQuery, useMutation, useQueryClient } from '@tanstack/react-query';
 import { adminFetch } from './admin-api';
 
+// ── Types ──────────────────────────────────────────────────────────────
+
 export interface DatabaseStatus {
   connected: boolean;
-  version: string;
-  host: string;
-  schema: string;
+  version: string | null;
+  host: string | null;
+  schema: string | null;
   timescaleDb: boolean;
 }
 
 export interface PoolStats {
   activeConnections: number;
   idleConnections: number;
-  pendingThreads: number;
-  maxPoolSize: number;
-  maxWaitMs: number;
+  threadsAwaitingConnection: number;
+  connectionTimeout: number;
+  maximumPoolSize: number;
 }
 
 export interface TableInfo {
@@ -33,18 +35,21 @@ export interface ActiveQuery {
   query: string;
 }
 
+// ── Query Hooks ────────────────────────────────────────────────────────
+
 export function useDatabaseStatus() {
   return useQuery({
     queryKey: ['admin', 'database', 'status'],
     queryFn: () => adminFetch<DatabaseStatus>('/database/status'),
+    refetchInterval: 30_000,
   });
 }
 
-export function useDatabasePool() {
+export function useConnectionPool() {
   return useQuery({
     queryKey: ['admin', 'database', 'pool'],
     queryFn: () => adminFetch<PoolStats>('/database/pool'),
-    refetchInterval: 15000,
+    refetchInterval: 10_000,
   });
 }
 
@@ -52,23 +57,27 @@ export function useDatabaseTables() {
   return useQuery({
     queryKey: ['admin', 'database', 'tables'],
     queryFn: () => adminFetch<TableInfo[]>('/database/tables'),
+    refetchInterval: 60_000,
   });
 }
 
-export function useDatabaseQueries() {
+export function useActiveQueries() {
   return useQuery({
     queryKey: ['admin', 'database', 'queries'],
     queryFn: () => adminFetch<ActiveQuery[]>('/database/queries'),
-    refetchInterval: 15000,
+    refetchInterval: 5_000,
   });
 }
 
+// ── Mutation Hooks ─────────────────────────────────────────────────────
+
 export function useKillQuery() {
   const qc = useQueryClient();
   return useMutation({
-    mutationFn: async (pid: number) => {
-      await adminFetch<void>(`/database/queries/${pid}/kill`, { method: 'POST' });
+    mutationFn: (pid: number) =>
+      adminFetch<void>(`/database/queries/${pid}/kill`, { method: 'POST' }),
+    onSuccess: () => {
+      qc.invalidateQueries({ queryKey: ['admin', 'database', 'queries'] });
     },
-    onSuccess: () => qc.invalidateQueries({ queryKey: ['admin', 'database', 'queries'] }),
   });
 }