fix(scripted-alarms): harden artifact boolean decode + direct helper tests (T6 review)

Default HistorizeToAveva/Retain/Enabled to the entity defaults (true) when a
field is absent/null/non-boolean so a partial blob decodes identically to the
composer's view of a default-constructed ScriptedAlarm (byte-parity), and only
call GetBoolean for a genuine true/false token. Add direct ExtractAlarmDependencyRefs
unit tests (overlap dedup + reserved {{equip}} exclusion).

tests/Core/ZB.MOM.WW.OtOpcUa.Commons.Tests/EquipmentScriptPathsTests.cs

@@ -6,6 +6,33 @@ namespace ZB.MOM.WW.OtOpcUa.Commons.Tests;
 
 public class EquipmentScriptPathsTests
 {
+    // ---- ExtractAlarmDependencyRefs (scripted-alarm dep graph; byte-parity seam) ----
+
+    [Fact]
+    public void ExtractAlarmDependencyRefs_predicate_reads_first_then_template_tokens_deduped()
+    {
+        // A template token identical to a predicate read appears once (predicate-first); a distinct
+        // template token is appended after. This dedup/order is the parity contract both the composer
+        // and the artifact decode rely on.
+        EquipmentScriptPaths
+            .ExtractAlarmDependencyRefs(
+                predicateSource: "return ctx.GetTag(\"Mach.Temp\").Value > 90;",
+                messageTemplate: "Temp {Mach.Temp} over {Mach.Limit}")
+            .ShouldBe(["Mach.Temp", "Mach.Limit"]);
+    }
+
+    [Fact]
+    public void ExtractAlarmDependencyRefs_excludes_reserved_equip_double_brace_token()
+    {
+        // The reserved {{equip}} double-brace form must NOT be picked up as a single-brace {TagPath}
+        // token; only the genuine {Line.Temp} token is extracted.
+        EquipmentScriptPaths
+            .ExtractAlarmDependencyRefs(
+                predicateSource: null,
+                messageTemplate: "{{equip}} too hot: {Line.Temp}")
+            .ShouldBe(["Line.Temp"]);
+    }
+
     // ---- DeriveEquipmentBase ----
 
     [Fact]