Auto: opcuaclient-1 — per-subscription tuning

Closes #273

src/ZB.MOM.WW.OtOpcUa.Driver.OpcUaClient/OpcUaClientDriver.cs

@@ -858,22 +858,24 @@ public sealed class OpcUaClientDriver(OpcUaClientDriverOptions options, string d
         var id = Interlocked.Increment(ref _nextSubscriptionId);
         var handle = new OpcUaSubscriptionHandle(id);
 
-        // Floor the publishing interval at 50ms — OPC UA servers routinely negotiate
-        // minimum-supported intervals up anyway, but sending sub-50ms wastes negotiation
-        // bandwidth on every subscription create.
-        var intervalMs = publishingInterval < TimeSpan.FromMilliseconds(50)
-            ? 50
+        // Floor the publishing interval — OPC UA servers routinely negotiate
+        // minimum-supported intervals up anyway, but sending sub-floor values wastes
+        // negotiation bandwidth on every subscription create. Floor is configurable via
+        // OpcUaSubscriptionDefaults.MinPublishingIntervalMs (default 50ms).
+        var subDefaults = _options.Subscriptions;
+        var intervalMs = publishingInterval < TimeSpan.FromMilliseconds(subDefaults.MinPublishingIntervalMs)
+            ? subDefaults.MinPublishingIntervalMs
             : (int)publishingInterval.TotalMilliseconds;
 
         var subscription = new Subscription(telemetry: null!, new SubscriptionOptions
         {
             DisplayName = $"opcua-sub-{id}",
             PublishingInterval = intervalMs,
-            KeepAliveCount = 10,
-            LifetimeCount = 1000,
-            MaxNotificationsPerPublish = 0,
+            KeepAliveCount = (uint)subDefaults.KeepAliveCount,
+            LifetimeCount = subDefaults.LifetimeCount,
+            MaxNotificationsPerPublish = subDefaults.MaxNotificationsPerPublish,
             PublishingEnabled = true,
-            Priority = 0,
+            Priority = subDefaults.Priority,
             TimestampsToReturn = TimestampsToReturn.Both,
         });
 
@@ -975,15 +977,16 @@ public sealed class OpcUaClientDriver(OpcUaClientDriverOptions options, string d
         // match in O(1) without re-parsing on every event.
         var sourceFilter = new HashSet<string>(sourceNodeIds, StringComparer.Ordinal);
 
+        var alarmDefaults = _options.Subscriptions;
         var subscription = new Subscription(telemetry: null!, new SubscriptionOptions
         {
             DisplayName = $"opcua-alarm-sub-{id}",
             PublishingInterval = 500,   // 500ms — alarms don't need fast polling; the server pushes
-            KeepAliveCount = 10,
-            LifetimeCount = 1000,
-            MaxNotificationsPerPublish = 0,
+            KeepAliveCount = (uint)alarmDefaults.KeepAliveCount,
+            LifetimeCount = alarmDefaults.LifetimeCount,
+            MaxNotificationsPerPublish = alarmDefaults.MaxNotificationsPerPublish,
             PublishingEnabled = true,
-            Priority = 0,
+            Priority = alarmDefaults.AlarmsPriority,
             TimestampsToReturn = TimestampsToReturn.Both,
         });