Hub v0.149.0: a box the household switched off is not an outage for 14 days (R-998)

hosts.deliberate_off_at follows the agent's deliberate_off field (set, then cleared by the first
report of a new boot; one info event each way). While held, every silence alarm is held: host and
node staleness, the 05:00 backup deadlines, off-site and restore-test freshness, the OS alarms and
the kernel notice. After 14 days the usual alarms fire once, naming the power-off. Pages show
KIKAPCSOLVA and the time. Consequence tests with controls; each guard red-proofed.

hub/internal/web/templates/hosts.html

@@ -104,7 +104,7 @@
                         <td>{{if .CustomerName}}{{.CustomerName}}{{else}}{{.CustomerID}}{{end}}</td>
                         <td>{{if .AgentVersion}}<code>{{.AgentVersion}}</code>{{else}}—{{end}}{{if .FloorHeld}} <span class="status-badge status-warn" title="{{.HeldReason}}">floor held</span>{{else if eq .FloorSource "declared"}} <span class="status-badge" title="served above the vouched golden: the agent requirement was declared with the floor (R-472)">floor: declared MinAgent</span>{{end}}</td>
                         <td style="font-size: 0.85em;">{{.PVEVersion}}<br><span class="text-muted">{{.KernelRunning}}</span></td>
-                        <td><span class="status-badge {{.StatusClass}}">{{.StatusLabel}}</span></td>
+                        <td><span class="status-badge {{.StatusClass}}">{{.StatusLabel}}</span>{{if .OffLine}}<br><span class="text-muted" style="font-size: 0.85em;" data-deliberate-off>{{.OffLine}}</span>{{end}}</td>
                         <td>{{if .HasReport}}{{.GuestRunning}}/{{.GuestTotal}}{{else}}—{{end}}</td>
                         <td>{{if .HasReport}}{{formatFloat .Vitals.CPUPercent}}%{{else}}—{{end}}</td>
                         <td>{{if .HasReport}}{{formatFloat .Vitals.MemoryPercent}}%{{else}}—{{end}}</td>