feat(debugview): DV-1 native-binding linkage on AlarmStateChanged contract chain

Add two additive init-only fields to AlarmStateChanged so the Debug View can
nest live native conditions under their configured source-binding node:
  - NativeSourceCanonicalName (binding canonical name, e.g. "Motor1.MotorAlarms")
  - IsConfiguredPlaceholder (quiet-binding placeholder flag; default false)

Flow on BOTH cross-process paths:
  - Live: proto AlarmStateUpdate fields 22/23 -> StreamRelayActor packs ->
    SiteStreamGrpcClient unpacks (regenerated SiteStreamGrpc/Sitestream.cs).
  - Snapshot (Newtonsoft): record defaults carry through; no special handling.

NativeAlarmActor.Emit now stamps NativeSourceCanonicalName = _source.CanonicalName.
Additive-only: no existing positional constructor or wire frame changed.

Tests: StreamRelayActorTests round-trips both fields pack->unpack;
NativeAlarmActorTests asserts the emitted event carries the binding canonical name.

src/ZB.MOM.WW.ScadaBridge.Commons/Messages/Streaming/AlarmStateChanged.cs

@@ -71,4 +71,18 @@ public record AlarmStateChanged(
 
     /// <summary>Limit/threshold value for native limit alarms (display-only); empty otherwise.</summary>
     public string LimitValue { get; init; } = string.Empty;
+
+    /// <summary>
+    /// Canonical name of the native alarm SOURCE BINDING this condition belongs to
+    /// (e.g. "Motor1.MotorAlarms"). Lets the Debug View nest live native conditions
+    /// under their configured binding node. Empty for computed alarms. Additive.
+    /// </summary>
+    public string NativeSourceCanonicalName { get; init; } = string.Empty;
+
+    /// <summary>
+    /// True when this row is a placeholder emitted for a CONFIGURED native source
+    /// binding that currently has no active conditions, so the Debug View tree can
+    /// show the binding node as "no active conditions". Additive; default false.
+    /// </summary>
+    public bool IsConfiguredPlaceholder { get; init; }
 }

src/ZB.MOM.WW.ScadaBridge.Communication/Actors/StreamRelayActor.cs

@@ -84,7 +84,9 @@ public class StreamRelayActor : ReceiveActor
                     ? Timestamp.FromDateTimeOffset(msg.OriginalRaiseTime.Value)
                     : null,
                 CurrentValue = msg.CurrentValue ?? string.Empty,
-                LimitValue = msg.LimitValue ?? string.Empty
+                LimitValue = msg.LimitValue ?? string.Empty,
+                NativeSourceCanonicalName = msg.NativeSourceCanonicalName ?? string.Empty,
+                IsConfiguredPlaceholder = msg.IsConfiguredPlaceholder
             }
         };
 

src/ZB.MOM.WW.ScadaBridge.Communication/Grpc/SiteStreamGrpcClient.cs

@@ -253,7 +253,9 @@ public class SiteStreamGrpcClient : IAsyncDisposable, IDisposable
             OperatorComment = evt.AlarmChanged.OperatorComment ?? string.Empty,
             OriginalRaiseTime = evt.AlarmChanged.OriginalRaiseTime?.ToDateTimeOffset(),
             CurrentValue = evt.AlarmChanged.CurrentValue ?? string.Empty,
-            LimitValue = evt.AlarmChanged.LimitValue ?? string.Empty
+            LimitValue = evt.AlarmChanged.LimitValue ?? string.Empty,
+            NativeSourceCanonicalName = evt.AlarmChanged.NativeSourceCanonicalName ?? string.Empty,
+            IsConfiguredPlaceholder = evt.AlarmChanged.IsConfiguredPlaceholder
         },
         _ => null
     };

src/ZB.MOM.WW.ScadaBridge.Communication/Protos/sitestream.proto

@@ -84,6 +84,8 @@ message AlarmStateUpdate {
   google.protobuf.Timestamp original_raise_time = 19;  // null when unknown
   string current_value = 20;
   string limit_value = 21;
+  string native_source_canonical_name = 22;  // native binding canonical name; empty for computed
+  bool is_configured_placeholder = 23;        // true for a quiet-binding placeholder row
 }
 
 // Audit Log (#23) telemetry: single lifecycle event ferried from a site SQLite

src/ZB.MOM.WW.ScadaBridge.Communication/SiteStreamGrpc/Sitestream.cs

@@ -36,7 +36,7 @@ namespace ZB.MOM.WW.ScadaBridge.Communication.Grpc {
             "KAkSFgoOYXR0cmlidXRlX3BhdGgYAiABKAkSFgoOYXR0cmlidXRlX25hbWUY",
             "AyABKAkSDQoFdmFsdWUYBCABKAkSJAoHcXVhbGl0eRgFIAEoDjITLnNpdGVz",
             "dHJlYW0uUXVhbGl0eRItCgl0aW1lc3RhbXAYBiABKAsyGi5nb29nbGUucHJv",
-            "dG9idWYuVGltZXN0YW1wIrgEChBBbGFybVN0YXRlVXBkYXRlEhwKFGluc3Rh",
+            "dG9idWYuVGltZXN0YW1wIoEFChBBbGFybVN0YXRlVXBkYXRlEhwKFGluc3Rh",
             "bmNlX3VuaXF1ZV9uYW1lGAEgASgJEhIKCmFsYXJtX25hbWUYAiABKAkSKQoF",
             "c3RhdGUYAyABKA4yGi5zaXRlc3RyZWFtLkFsYXJtU3RhdGVFbnVtEhAKCHBy",
             "aW9yaXR5GAQgASgFEi0KCXRpbWVzdGFtcBgFIAEoCzIaLmdvb2dsZS5wcm90",
@@ -49,69 +49,70 @@ namespace ZB.MOM.WW.ScadaBridge.Communication.Grpc {
             "c2VyGBEgASgJEhgKEG9wZXJhdG9yX2NvbW1lbnQYEiABKAkSNwoTb3JpZ2lu",
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-            "LkdycGNiBnByb3RvMw=="));
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+            "V1cuU2NhZGFCcmlkZ2UuQ29tbXVuaWNhdGlvbi5HcnBjYgZwcm90bzM="));
       descriptor = pbr::FileDescriptor.FromGeneratedCode(descriptorData,
           new pbr::FileDescriptor[] { global::Google.Protobuf.WellKnownTypes.TimestampReflection.Descriptor, global::Google.Protobuf.WellKnownTypes.WrappersReflection.Descriptor, },
           new pbr::GeneratedClrTypeInfo(new[] {typeof(global::ZB.MOM.WW.ScadaBridge.Communication.Grpc.Quality), typeof(global::ZB.MOM.WW.ScadaBridge.Communication.Grpc.AlarmStateEnum), typeof(global::ZB.MOM.WW.ScadaBridge.Communication.Grpc.AlarmLevelEnum), }, null, new pbr::GeneratedClrTypeInfo[] {
             new pbr::GeneratedClrTypeInfo(typeof(global::ZB.MOM.WW.ScadaBridge.Communication.Grpc.InstanceStreamRequest), global::ZB.MOM.WW.ScadaBridge.Communication.Grpc.InstanceStreamRequest.Parser, new[]{ "CorrelationId", "InstanceUniqueName" }, null, null, null, null),
             new pbr::GeneratedClrTypeInfo(typeof(global::ZB.MOM.WW.ScadaBridge.Communication.Grpc.SiteStreamEvent), global::ZB.MOM.WW.ScadaBridge.Communication.Grpc.SiteStreamEvent.Parser, new[]{ "CorrelationId", "AttributeChanged", "AlarmChanged" }, new[]{ "Event" }, null, null, null),
             new pbr::GeneratedClrTypeInfo(typeof(global::ZB.MOM.WW.ScadaBridge.Communication.Grpc.AttributeValueUpdate), global::ZB.MOM.WW.ScadaBridge.Communication.Grpc.AttributeValueUpdate.Parser, new[]{ "InstanceUniqueName", "AttributePath", "AttributeName", "Value", "Quality", "Timestamp" }, null, null, null, null),
-            new pbr::GeneratedClrTypeInfo(typeof(global::ZB.MOM.WW.ScadaBridge.Communication.Grpc.AlarmStateUpdate), global::ZB.MOM.WW.ScadaBridge.Communication.Grpc.AlarmStateUpdate.Parser, new[]{ "InstanceUniqueName", "AlarmName", "State", "Priority", "Timestamp", "Level", "Message", "Kind", "Active", "Acknowledged", "Confirmed", "ShelveState", "Suppressed", "SourceReference", "AlarmTypeName", "Category", "OperatorUser", "OperatorComment", "OriginalRaiseTime", "CurrentValue", "LimitValue" }, null, null, null, null),
+            new pbr::GeneratedClrTypeInfo(typeof(global::ZB.MOM.WW.ScadaBridge.Communication.Grpc.AlarmStateUpdate), global::ZB.MOM.WW.ScadaBridge.Communication.Grpc.AlarmStateUpdate.Parser, new[]{ "InstanceUniqueName", "AlarmName", "State", "Priority", "Timestamp", "Level", "Message", "Kind", "Active", "Acknowledged", "Confirmed", "ShelveState", "Suppressed", "SourceReference", "AlarmTypeName", "Category", "OperatorUser", "OperatorComment", "OriginalRaiseTime", "CurrentValue", "LimitValue", "NativeSourceCanonicalName", "IsConfiguredPlaceholder" }, null, null, null, null),
             new pbr::GeneratedClrTypeInfo(typeof(global::ZB.MOM.WW.ScadaBridge.Communication.Grpc.AuditEventDto), global::ZB.MOM.WW.ScadaBridge.Communication.Grpc.AuditEventDto.Parser, new[]{ "EventId", "OccurredAtUtc", "Channel", "Kind", "CorrelationId", "SourceSiteId", "SourceInstanceId", "SourceScript", "Actor", "Target", "Status", "HttpStatus", "DurationMs", "ErrorMessage", "ErrorDetail", "RequestSummary", "ResponseSummary", "PayloadTruncated", "Extra", "ExecutionId", "ParentExecutionId", "SourceNode" }, null, null, null, null),
             new pbr::GeneratedClrTypeInfo(typeof(global::ZB.MOM.WW.ScadaBridge.Communication.Grpc.AuditEventBatch), global::ZB.MOM.WW.ScadaBridge.Communication.Grpc.AuditEventBatch.Parser, new[]{ "Events" }, null, null, null, null),
             new pbr::GeneratedClrTypeInfo(typeof(global::ZB.MOM.WW.ScadaBridge.Communication.Grpc.IngestAck), global::ZB.MOM.WW.ScadaBridge.Communication.Grpc.IngestAck.Parser, new[]{ "AcceptedEventIds" }, null, null, null, null),
@@ -1171,6 +1172,8 @@ namespace ZB.MOM.WW.ScadaBridge.Communication.Grpc {
       originalRaiseTime_ = other.originalRaiseTime_ != null ? other.originalRaiseTime_.Clone() : null;
       currentValue_ = other.currentValue_;
       limitValue_ = other.limitValue_;
+      nativeSourceCanonicalName_ = other.nativeSourceCanonicalName_;
+      isConfiguredPlaceholder_ = other.isConfiguredPlaceholder_;
       _unknownFields = pb::UnknownFieldSet.Clone(other._unknownFields);
     }
 
@@ -1460,6 +1463,36 @@ namespace ZB.MOM.WW.ScadaBridge.Communication.Grpc {
       }
     }
 
+    /// <summary>Field number for the "native_source_canonical_name" field.</summary>
+    public const int NativeSourceCanonicalNameFieldNumber = 22;
+    private string nativeSourceCanonicalName_ = "";
+    /// <summary>
+    /// native binding canonical name; empty for computed
+    /// </summary>
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
+    public string NativeSourceCanonicalName {
+      get { return nativeSourceCanonicalName_; }
+      set {
+        nativeSourceCanonicalName_ = pb::ProtoPreconditions.CheckNotNull(value, "value");
+      }
+    }
+
+    /// <summary>Field number for the "is_configured_placeholder" field.</summary>
+    public const int IsConfiguredPlaceholderFieldNumber = 23;
+    private bool isConfiguredPlaceholder_;
+    /// <summary>
+    /// true for a quiet-binding placeholder row
+    /// </summary>
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
+    [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
+    public bool IsConfiguredPlaceholder {
+      get { return isConfiguredPlaceholder_; }
+      set {
+        isConfiguredPlaceholder_ = value;
+      }
+    }
+
     [global::System.Diagnostics.DebuggerNonUserCodeAttribute]
     [global::System.CodeDom.Compiler.GeneratedCode("protoc", null)]
     public override bool Equals(object other) {
@@ -1496,6 +1529,8 @@ namespace ZB.MOM.WW.ScadaBridge.Communication.Grpc {
       if (!object.Equals(OriginalRaiseTime, other.OriginalRaiseTime)) return false;
       if (CurrentValue != other.CurrentValue) return false;
       if (LimitValue != other.LimitValue) return false;
+      if (NativeSourceCanonicalName != other.NativeSourceCanonicalName) return false;
+      if (IsConfiguredPlaceholder != other.IsConfiguredPlaceholder) return false;
       return Equals(_unknownFields, other._unknownFields);
     }
 
@@ -1524,6 +1559,8 @@ namespace ZB.MOM.WW.ScadaBridge.Communication.Grpc {
       if (originalRaiseTime_ != null) hash ^= OriginalRaiseTime.GetHashCode();
       if (CurrentValue.Length != 0) hash ^= CurrentValue.GetHashCode();
       if (LimitValue.Length != 0) hash ^= LimitValue.GetHashCode();
+      if (NativeSourceCanonicalName.Length != 0) hash ^= NativeSourceCanonicalName.GetHashCode();
+      if (IsConfiguredPlaceholder != false) hash ^= IsConfiguredPlaceholder.GetHashCode();
       if (_unknownFields != null) {
         hash ^= _unknownFields.GetHashCode();
       }
@@ -1626,6 +1663,14 @@ namespace ZB.MOM.WW.ScadaBridge.Communication.Grpc {
         output.WriteRawTag(170, 1);
         output.WriteString(LimitValue);
       }
+      if (NativeSourceCanonicalName.Length != 0) {
+        output.WriteRawTag(178, 1);
+        output.WriteString(NativeSourceCanonicalName);
+      }
+      if (IsConfiguredPlaceholder != false) {
+        output.WriteRawTag(184, 1);
+        output.WriteBool(IsConfiguredPlaceholder);
+      }
       if (_unknownFields != null) {
         _unknownFields.WriteTo(output);
       }
@@ -1720,6 +1765,14 @@ namespace ZB.MOM.WW.ScadaBridge.Communication.Grpc {
         output.WriteRawTag(170, 1);
         output.WriteString(LimitValue);
       }
+      if (NativeSourceCanonicalName.Length != 0) {
+        output.WriteRawTag(178, 1);
+        output.WriteString(NativeSourceCanonicalName);
+      }
+      if (IsConfiguredPlaceholder != false) {
+        output.WriteRawTag(184, 1);
+        output.WriteBool(IsConfiguredPlaceholder);
+      }
       if (_unknownFields != null) {
         _unknownFields.WriteTo(ref output);
       }
@@ -1793,6 +1846,12 @@ namespace ZB.MOM.WW.ScadaBridge.Communication.Grpc {
       if (LimitValue.Length != 0) {
         size += 2 + pb::CodedOutputStream.ComputeStringSize(LimitValue);
       }
+      if (NativeSourceCanonicalName.Length != 0) {
+        size += 2 + pb::CodedOutputStream.ComputeStringSize(NativeSourceCanonicalName);
+      }
+      if (IsConfiguredPlaceholder != false) {
+        size += 2 + 1;
+      }
       if (_unknownFields != null) {
         size += _unknownFields.CalculateSize();
       }
@@ -1874,6 +1933,12 @@ namespace ZB.MOM.WW.ScadaBridge.Communication.Grpc {
       if (other.LimitValue.Length != 0) {
         LimitValue = other.LimitValue;
       }
+      if (other.NativeSourceCanonicalName.Length != 0) {
+        NativeSourceCanonicalName = other.NativeSourceCanonicalName;
+      }
+      if (other.IsConfiguredPlaceholder != false) {
+        IsConfiguredPlaceholder = other.IsConfiguredPlaceholder;
+      }
       _unknownFields = pb::UnknownFieldSet.MergeFrom(_unknownFields, other._unknownFields);
     }
 
@@ -1983,6 +2048,14 @@ namespace ZB.MOM.WW.ScadaBridge.Communication.Grpc {
             LimitValue = input.ReadString();
             break;
           }
+          case 178: {
+            NativeSourceCanonicalName = input.ReadString();
+            break;
+          }
+          case 184: {
+            IsConfiguredPlaceholder = input.ReadBool();
+            break;
+          }
         }
       }
     #endif
@@ -2092,6 +2165,14 @@ namespace ZB.MOM.WW.ScadaBridge.Communication.Grpc {
             LimitValue = input.ReadString();
             break;
           }
+          case 178: {
+            NativeSourceCanonicalName = input.ReadString();
+            break;
+          }
+          case 184: {
+            IsConfiguredPlaceholder = input.ReadBool();
+            break;
+          }
         }
       }
     }

src/ZB.MOM.WW.ScadaBridge.SiteRuntime/Actors/NativeAlarmActor.cs

@@ -330,7 +330,8 @@ public class NativeAlarmActor : ReceiveActor
             OperatorComment = t.OperatorComment,
             OriginalRaiseTime = t.OriginalRaiseTime,
             CurrentValue = t.CurrentValue,
-            LimitValue = t.LimitValue
+            LimitValue = t.LimitValue,
+            NativeSourceCanonicalName = _source.CanonicalName,
         };
 
         _instanceActor.Tell(change);

tests/ZB.MOM.WW.ScadaBridge.Communication.Tests/Grpc/StreamRelayActorTests.cs

@@ -113,6 +113,52 @@ public class StreamRelayActorTests : TestKit
         Assert.Equal("90", alarm.LimitValue);
     }
 
+    [Fact]
+    public void RelaysAlarmStateChanged_NativeBindingLinkage_SurvivesFullRoundTrip()
+    {
+        // DV-1: the native source-binding canonical name and the configured-placeholder
+        // flag must pack into AlarmStateUpdate (StreamRelayActor) and unpack back out
+        // (SiteStreamGrpcClient.ConvertToDomainEvent) — the full cross-process round trip.
+        var channel = Channel.CreateUnbounded<SiteStreamEvent>();
+        var actor = Sys.ActorOf(Props.Create(() =>
+            new StreamRelayActor("corr-native-binding", channel.Writer)));
+
+        var timestamp = new DateTimeOffset(2026, 3, 21, 11, 0, 0, TimeSpan.Zero);
+        var domainEvent = new AlarmStateChanged(
+            "Site1.Motor01", "Motor1.MotorAlarms.Hi", AlarmState.Active, 900, timestamp)
+        {
+            Kind = AlarmKind.NativeOpcUa,
+            SourceReference = "Motor1.MotorAlarms.Hi",
+            NativeSourceCanonicalName = "Motor1.MotorAlarms",
+            IsConfiguredPlaceholder = true,
+            Condition = new AlarmConditionState(
+                Active: true, Acknowledged: false, Confirmed: null,
+                Shelve: AlarmShelveState.Unshelved, Suppressed: false, Severity: 900)
+        };
+
+        actor.Tell(domainEvent);
+
+        var success = channel.Reader.TryRead(out var protoEvent);
+        if (!success)
+        {
+            Thread.Sleep(500);
+            success = channel.Reader.TryRead(out protoEvent);
+        }
+
+        Assert.True(success, "Expected a proto event on the channel");
+        Assert.NotNull(protoEvent);
+
+        // Packed onto the wire frame by StreamRelayActor.
+        Assert.Equal("Motor1.MotorAlarms", protoEvent.AlarmChanged.NativeSourceCanonicalName);
+        Assert.True(protoEvent.AlarmChanged.IsConfiguredPlaceholder);
+
+        // Unpacked back into the domain record by SiteStreamGrpcClient.
+        var roundTripped = Assert.IsType<AlarmStateChanged>(
+            SiteStreamGrpcClient.ConvertToDomainEvent(protoEvent));
+        Assert.Equal("Motor1.MotorAlarms", roundTripped.NativeSourceCanonicalName);
+        Assert.True(roundTripped.IsConfiguredPlaceholder);
+    }
+
     [Fact]
     public void SetsCorrelationId_OnAllEvents()
     {

tests/ZB.MOM.WW.ScadaBridge.SiteRuntime.Tests/Actors/NativeAlarmActorTests.cs

@@ -79,6 +79,27 @@ public class NativeAlarmActorTests : TestKit, IDisposable
         Assert.Equal(800, emitted.Condition.Severity);
     }
 
+    [Fact]
+    public void Raise_StampsNativeSourceCanonicalName_FromConfiguredBinding()
+    {
+        // DV-1: every emitted condition carries the canonical name of the source
+        // BINDING it belongs to, so the DebugView can nest live native conditions
+        // under their configured binding node. It must equal the binding's
+        // CanonicalName used to construct the actor (Source().CanonicalName).
+        var instance = CreateTestProbe();
+        var dcl = CreateTestProbe();
+        var actor = Spawn(instance.Ref, dcl.Ref);
+        dcl.ExpectMsg<SubscribeAlarmsRequest>();
+
+        actor.Tell(new NativeAlarmTransitionUpdate("Opc", Transition(
+            "T01.Hi", AlarmTransitionKind.Raise,
+            new AlarmConditionState(true, false, null, AlarmShelveState.Unshelved, false, 800))));
+
+        var emitted = instance.ExpectMsg<AlarmStateChanged>();
+        Assert.Equal(Source().CanonicalName, emitted.NativeSourceCanonicalName);
+        Assert.Equal("Pressure", emitted.NativeSourceCanonicalName);
+    }
+
     [Fact]
     public void SnapshotComplete_WithMissingPriorAlarm_EmitsReturnToNormal()
     {