add hub instance info (#869)

- Improvement: Hub module listing now includes per-instance process metrics (memory, CPU time, working set, pagefile usage)
- Improvement: Hub now monitors provisioned instance health in the background and refreshes process metrics periodically
- Improvement: Hub no longer exposes raw `StorageServerInstance` pointers to callers; instance state is returned as value snapshots (`Hub::InstanceInfo`)
- Improvement: Hub instance access is now guarded by RAII per-instance locks (`SharedLockedPtr`/`ExclusiveLockedPtr`), preventing concurrent modifications during provisioning and deprovisioning
- Improvement: Hub instance lifecycle is now tracked as a `HubInstanceState` enum covering transitional states (Provisioning, Deprovisioning, Hibernating, Waking); exposed as a string in the HTTP API and dashboard

2 files changed, 4 insertions, 4 deletions

diff --git a/src/zenserver/frontend/html/compute/hub.html b/src/zenserver/frontend/html/compute/hub.html
index 620349a2b..b15b34577 100644
--- a/src/zenserver/frontend/html/compute/hub.html
+++ b/src/zenserver/frontend/html/compute/hub.html
@@ -127,11 +127,11 @@
             for (var i = 0; i < modules.length; i++) {
                 var m = modules[i];
                 var moduleId = m.moduleId || '';
-                var provisioned = m.provisioned;
+                var state = m.state || 'unprovisioned';
 
-                var badge = provisioned
+                var badge = (state === 'provisioned')
                     ? '<span class="status-badge active">Provisioned</span>'
-                    : '<span class="status-badge inactive">Inactive</span>';
+                    : '<span class="status-badge inactive">' + escapeHtml(state.charAt(0).toUpperCase() + state.slice(1)) + '</span>';
 
                 var tr = document.createElement('tr');
                 tr.innerHTML =
diff --git a/src/zenserver/frontend/html/pages/hub.js b/src/zenserver/frontend/html/pages/hub.js
index f9e4fff33..00d156c5e 100644
--- a/src/zenserver/frontend/html/pages/hub.js
+++ b/src/zenserver/frontend/html/pages/hub.js
@@ -104,7 +104,7 @@ export class Page extends ZenPage
 		{
 			this._mod_table.add_row(
 				m.moduleId || "",
-				m.provisioned ? "provisioned" : "inactive",
+				m.state || "unprovisioned",
 			);
 		}
 	}