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/ExchangesPage.tsx

@@ -3,7 +3,7 @@ import { useNavigate, useLocation, useParams } from 'react-router';
 import { useGlobalFilters, useToast } from '@cameleer/design-system';
 import { useExecutionDetail } from '../../api/queries/executions';
 import { useDiagramByRoute } from '../../api/queries/diagrams';
-import { useRouteCatalog } from '../../api/queries/catalog';
+import { useCatalog } from '../../api/queries/catalog';
 import { useAgents } from '../../api/queries/agents';
 import { useApplicationConfig, useUpdateApplicationConfig } from '../../api/queries/commands';
 import type { TapDefinition, ConfigUpdateResponse } from '../../api/queries/commands';
@@ -150,7 +150,7 @@ function DiagramPanel({ appId, routeId, exchangeId, onCorrelatedSelect, onClearS
   const { data: detail } = useExecutionDetail(exchangeId ?? null);
   const diagramQuery = useDiagramByRoute(appId, routeId);
 
-  const { data: catalog } = useRouteCatalog(timeFrom, timeTo);
+  const { data: catalog } = useCatalog();
 
   // Route state + capabilities for topology-only control bar
   const { data: agents } = useAgents(undefined, appId);
@@ -166,7 +166,7 @@ function DiagramPanel({ appId, routeId, exchangeId, onCorrelatedSelect, onClearS
   const routeState = useMemo(() => {
     if (!catalog) return undefined;
     for (const app of catalog as any[]) {
-      if (app.applicationId !== appId) continue;
+      if (app.slug !== appId) continue;
       for (const r of app.routes || []) {
         if (r.routeId === routeId) return (r.routeState ?? 'started') as 'started' | 'stopped' | 'suspended';
       }