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/settings/admin-panel/components/SettingsAdminContent.tsx

@@ -3,7 +3,7 @@ import { SETTINGS_ADMIN_TABS } from '@/settings/admin-panel/constants/SettingsAd
 import { SETTINGS_ADMIN_TABS_ID } from '@/settings/admin-panel/constants/SettingsAdminTabsId';
 import { TabList } from '@/ui/layout/tab/components/TabList';
 import styled from '@emotion/styled';
-import { IconSettings2, IconVariable } from 'twenty-ui';
+import { IconHeart, IconSettings2, IconVariable } from 'twenty-ui';
 
 const StyledTabListContainer = styled.div`
   align-items: center;
@@ -25,6 +25,11 @@ export const SettingsAdminContent = () => {
       title: 'Env Variables',
       Icon: IconVariable,
     },
+    {
+      id: SETTINGS_ADMIN_TABS.HEALTH_STATUS,
+      title: 'Health Status',
+      Icon: IconHeart,
+    },
   ];
 
   return (