feat(monitors): Monitors absorbs the Status page; Status is removed (#5270)

Status repeated the Monitors page's counts, check strip and uptime. Monitors
now has one header row and every column Status had: the last 30 checks,
latest response with its trend, uptime over 24h / 7d / 30d (the range picker
goes) and TLS days on every row. /status and /status/rows and the nav link
are removed outright; the dashboard Overview (/status/widget) stays and its
Details link goes to Monitors.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

steward/templates/base.html

@@ -46,7 +46,6 @@
       <div class="nav-group">
         <div class="nav-group-label">Overview</div>
         <a href="/" {% if _p == '/' %}class="active" aria-current="page"{% endif %}>Dashboard</a>
-        <a href="/status" {% if _p.startswith('/status') %}class="active" aria-current="page"{% endif %}>Status</a>
       </div>
       <div class="nav-group">
         <div class="nav-group-label">Infrastructure</div>