Health monitor status for admin panel (#10186)

# Health Monitoring for Self-Hosted Instances

This PR implements basic health monitoring for self-hosted instances in
the admin panel.

## Service Status Checks
We're adding real-time health checks for:
- Redis Connection
- Database Connection
- Worker Status
- Message Sync Status

## Existing Functionality
We already have message sync and captcha counters that store aggregated
metrics in cache within a configurable time window (default: 5 minutes).

## New Endpoints
1. `/healthz` - Basic server health check for Kubernetes pod monitoring
2. `/healthz/{serviceName}` - Individual service health checks (returns
200 if healthy)
3. `/metricsz/{metricName}` - Time-windowed metrics (message sync,
captcha)
4. GraphQL resolver in admin panel for UI consumption

All endpoints use the same underlying service, with different
presentation layers for infrastructure and UI needs.

---------

Co-authored-by: Félix Malfait <felix@twenty.com>

packages/twenty-front/src/modules/app/components/SettingsRoutes.tsx

@@ -248,6 +248,14 @@ const SettingsAdminContent = lazy(() =>
   ),
 );
 
+const SettingsAdminIndicatorHealthStatus = lazy(() =>
+  import(
+    '~/pages/settings/admin-panel/SettingsAdminIndicatorHealthStatus'
+  ).then((module) => ({
+    default: module.SettingsAdminIndicatorHealthStatus,
+  })),
+);
+
 const SettingsLab = lazy(() =>
   import('~/pages/settings/lab/SettingsLab').then((module) => ({
     default: module.SettingsLab,
@@ -407,6 +415,10 @@ export const SettingsRoutes = ({
             path={SettingsPath.FeatureFlags}
             element={<SettingsAdminContent />}
           />
+          <Route
+            path={SettingsPath.AdminPanelIndicatorHealthStatus}
+            element={<SettingsAdminIndicatorHealthStatus />}
+          />
         </>
       )}
       <Route path={SettingsPath.Lab} element={<SettingsLab />} />