Merge pull request 'Phase 2 PR 9 — thread IsAlarm discovery flag end-to-end' (#8) from phase-2-pr9-alarms into v2

src/ZB.MOM.WW.OtOpcUa.Core.Abstractions/DriverAttributeInfo.cs

@@ -19,10 +19,17 @@ namespace ZB.MOM.WW.OtOpcUa.Core.Abstractions;
 /// <param name="ArrayDim">Declared array length when <see cref="IsArray"/> is true; null otherwise.</param>
 /// <param name="SecurityClass">Write-authorization tier for this attribute.</param>
 /// <param name="IsHistorized">True when this attribute is expected to feed historian / HistoryRead.</param>
+/// <param name="IsAlarm">
+///     True when this attribute represents an alarm condition (Galaxy: has an
+///     <c>AlarmExtension</c> primitive). The generic node-manager enriches the variable with an
+///     OPC UA <c>AlarmConditionState</c> when true. Defaults to false so existing non-Galaxy
+///     drivers aren't forced to flow a flag they don't produce.
+/// </param>
 public sealed record DriverAttributeInfo(
     string FullName,
     DriverDataType DriverDataType,
     bool IsArray,
     uint? ArrayDim,
     SecurityClassification SecurityClass,
-    bool IsHistorized);
+    bool IsHistorized,
+    bool IsAlarm = false);

src/ZB.MOM.WW.OtOpcUa.Driver.Galaxy.Host/Backend/DbBackedGalaxyBackend.cs

@@ -147,6 +147,7 @@ public sealed class DbBackedGalaxyBackend(GalaxyRepository repository) : IGalaxy
         ArrayDim = row.ArrayDimension is int d and > 0 ? (uint)d : null,
         SecurityClassification = row.SecurityClassification,
         IsHistorized = row.IsHistorized,
+        IsAlarm = row.IsAlarm,
     };
 
     /// <summary>

src/ZB.MOM.WW.OtOpcUa.Driver.Galaxy.Host/Backend/MxAccessGalaxyBackend.cs

@@ -392,6 +392,7 @@ public sealed class MxAccessGalaxyBackend : IGalaxyBackend, IDisposable
         ArrayDim = row.ArrayDimension is int d and > 0 ? (uint)d : null,
         SecurityClassification = row.SecurityClassification,
         IsHistorized = row.IsHistorized,
+        IsAlarm = row.IsAlarm,
     };
 
     private static string MapCategory(int categoryId) => categoryId switch

src/ZB.MOM.WW.OtOpcUa.Driver.Galaxy.Proxy/GalaxyProxyDriver.cs

@@ -123,7 +123,8 @@ public sealed class GalaxyProxyDriver(GalaxyProxyOptions options)
                         IsArray: attr.IsArray,
                         ArrayDim: attr.ArrayDim,
                         SecurityClass: MapSecurity(attr.SecurityClassification),
-                        IsHistorized: attr.IsHistorized));
+                        IsHistorized: attr.IsHistorized,
+                        IsAlarm: attr.IsAlarm));
             }
         }
     }

src/ZB.MOM.WW.OtOpcUa.Driver.Galaxy.Shared/Contracts/Discovery.cs

@@ -30,6 +30,15 @@ public sealed class GalaxyAttributeInfo
     [Key(3)] public uint? ArrayDim { get; set; }
     [Key(4)] public int SecurityClassification { get; set; }
     [Key(5)] public bool IsHistorized { get; set; }
+
+    /// <summary>
+    ///     True when the attribute has an AlarmExtension primitive in the Galaxy repository
+    ///     (<c>primitive_definition.primitive_name = 'AlarmExtension'</c>). The generic
+    ///     node-manager uses this to enrich the variable's OPC UA node with an
+    ///     <c>AlarmConditionState</c> during address-space build. Added in PR 9 as the
+    ///     discovery-side foundation for the alarm event wire-up that follows in PR 10+.
+    /// </summary>
+    [Key(6)] public bool IsAlarm { get; set; }
 }
 
 [MessagePackObject]