feat: unified catalog endpoint and slug-based app navigation

Consolidate route catalog (agent-driven) and apps table (deployment-
driven) into a single GET /api/v1/catalog?environment={slug} endpoint.
Apps table is authoritative; agent data enriches with live health,
routes, and metrics. Unmanaged apps (agents without App record) appear
with managed=false.

- Add CatalogController merging App records + agent registry + ClickHouse
- Add CatalogApp DTO with deployment summary, managed flag, health
- Change AppController and DeploymentController to accept slugs (not UUIDs)
- Add AppRepository.findBySlug() and AppService.getBySlug()
- Replace useRouteCatalog() with useCatalog() across all UI components
- Navigate to /apps/{slug} instead of /apps/{UUID}
- Update sidebar, search, and all catalog lookups to use slug

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

ui/src/pages/Exchanges/ExchangeHeader.tsx

@@ -4,7 +4,7 @@ import { GitBranch, Server, RotateCcw, FileText } from 'lucide-react';
 import { StatusDot, MonoText, Badge, useGlobalFilters } from '@cameleer/design-system';
 import { useCorrelationChain } from '../../api/queries/correlation';
 import { useAgents } from '../../api/queries/agents';
-import { useRouteCatalog } from '../../api/queries/catalog';
+import { useCatalog } from '../../api/queries/catalog';
 import { useCanControl } from '../../auth/auth-store';
 import type { ExecutionDetail } from '../../components/ExecutionDiagram/types';
 import { attributeBadgeColor } from '../../utils/attribute-color';
@@ -52,11 +52,11 @@ export function ExchangeHeader({ detail, onCorrelatedSelect, onClearSelection }:
   const attrs = Object.entries(detail.attributes ?? {});
 
   // Look up route state from catalog
-  const { data: catalog } = useRouteCatalog(timeRange.start.toISOString(), timeRange.end.toISOString());
+  const { data: catalog } = useCatalog();
   const routeState = useMemo(() => {
     if (!catalog) return undefined;
     for (const app of catalog as any[]) {
-      if (app.appId !== detail.applicationId) continue;
+      if (app.slug !== detail.applicationId) continue;
       for (const route of app.routes || []) {
         if (route.routeId === detail.routeId) {
           return (route.routeState ?? 'started') as 'started' | 'stopped' | 'suspended';