Merge b647-focas-alarms: FOCAS native alarms reach Part 9 conditions (ALARM: address) + respawn keeps acks host-side (#647)

Claude-Session: https://claude.ai/code/session_01Ef2ozxS7QPanGT8uoATbTe

tests/Server/ZB.MOM.WW.OtOpcUa.OpcUaServer.IntegrationTests/OpcUaClientDriverWireTests.cs

@@ -256,7 +256,7 @@ public sealed class OpcUaClientDriverWireTests
 
     /// <summary>
     ///     #619 — ConditionRefresh over the wire: a condition already active+unacked BEFORE the driver subscribes is
-    ///     reported (Raise, keyed by the RawPath) right after subscribe, not only on its next transition. A second
+    ///     reported (Retrigger since #647, keyed by the RawPath) right after subscribe, not only on its next transition. A second
     ///     subscribe of the same set refreshes again and must emit nothing (no re-raise); a positive control then
     ///     proves the feed is still live by acknowledging upstream and seeing exactly the Acknowledge arrive.
     /// </summary>
@@ -291,9 +291,11 @@ public sealed class OpcUaClientDriverWireTests
         AlarmEventArgs[] Seen() { lock (seen) return [.. seen]; }
 
         var first = await drv.SubscribeAlarmsAsync([AlarmRef], ct);
-        await RecordedEvents.WaitUntilAsync(() => Seen().Any(e => e.Kind == AlarmTransitionKind.Raise));
+        // First sight of an active+UNACKED upstream condition is a Retrigger (#647 review): the host keeps an ack
+        // across a Raise on an already-active condition, so only a Retrigger forces the upstream's unack.
+        await RecordedEvents.WaitUntilAsync(() => Seen().Any(e => e.Kind == AlarmTransitionKind.Retrigger));
 
-        var raise = Seen().Single(e => e.Kind == AlarmTransitionKind.Raise);
+        var raise = Seen().Single(e => e.Kind == AlarmTransitionKind.Retrigger);
         raise.ConditionId.ShouldBe(AlarmRef);
         raise.Message.ShouldBe("already hot");
         raise.OpcUaSeverity.ShouldBe(800);