hub v0.3.3: Fix version double-v prefix, skip deprecated ping_uuids in diff

- Remove extra "v" prefix from ControllerVersion display (was "vv0.21.1")
- Add monitoring.ping_uuids.* to volatile keys — skipped in config diff
- Update manifest to v0.3.3

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

hub/internal/web/templates/customer.html

@@ -19,7 +19,7 @@
                 <span class="status-dot" style="color: {{statusColor .OverallStatus}}">{{statusIcon .OverallStatus}}</span>
                 {{.Customer.CustomerName}}
             </h1>
-            <p class="subtitle">Last report: {{timeAgo .Customer.ReceivedAt}} &middot; Controller v{{.Customer.ControllerVersion}}</p>
+            <p class="subtitle">Last report: {{timeAgo .Customer.ReceivedAt}} &middot; Controller {{.Customer.ControllerVersion}}</p>
         </header>
 
         <!-- System Info -->
@@ -193,7 +193,7 @@
             <div class="info-grid">
                 <div class="info-item">
                     <span class="label">Current version</span>
-                    <span class="value">v{{.Customer.ControllerVersion}}</span>
+                    <span class="value">{{.Customer.ControllerVersion}}</span>
                 </div>
                 {{if .LatestVersion}}
                 <div class="info-item">