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

1 files changed, 9 insertions, 3 deletions

diff --git a/src/zenserver-test/hub-tests.cpp b/src/zenserver-test/hub-tests.cpp
index 29c3b76ba..a372b11e5 100644
--- a/src/zenserver-test/hub-tests.cpp
+++ b/src/zenserver-test/hub-tests.cpp
@@ -44,7 +44,8 @@ TEST_CASE("hub.lifecycle.basic")
 		HttpClient Client(Instance.GetBaseUri() + "/hub/");
 
 		HttpClient::Response Result = Client.Get("status");
-		CHECK(Result);
+		REQUIRE(Result);
+		CHECK_EQ(Result.AsObject()["modules"].AsArrayView().Num(), 0u);
 	}
 }
 
@@ -71,6 +72,10 @@ TEST_CASE("hub.lifecycle.children")
 			const uint16_t AbcPort = AbcResult["port"].AsUInt16(0);
 			CHECK_NE(AbcPort, 0);
 
+			Result = Client.Get("modules/abc");
+			REQUIRE(Result);
+			CHECK_EQ(Result.AsObject()["state"].AsString(), "provisioned"sv);
+
 			// This should be a fresh instance with no contents
 
 			HttpClient AbcClient(fmt::format("http://localhost:{}", AbcPort));
@@ -231,9 +236,10 @@ TEST_CASE("hub.lifecycle.children")
 		Result = Client.Post("modules/def/deprovision");
 		REQUIRE(Result);
 
-		// final sanity check that the hub is still responsive
+		// final sanity check that the hub is still responsive and all modules are gone
 		Result = Client.Get("status");
-		CHECK(Result);
+		REQUIRE(Result);
+		CHECK_EQ(Result.AsObject()["modules"].AsArrayView().Num(), 0u);
 	}
 }