Phase 0 WP-0.2–0.9: Implement Commons (types, entities, interfaces, messages, protocol, tests)

- WP-0.2: Namespace/folder skeleton (26 directories)
- WP-0.3: Shared data types (6 enums, RetryPolicy, Result<T>)
- WP-0.4: 24 domain entity POCOs across 10 domain areas
- WP-0.5: 7 repository interfaces with full CRUD signatures
- WP-0.6: IAuditService cross-cutting interface
- WP-0.7: 26 message contract records across 8 concern areas
- WP-0.8: IDataConnection protocol abstraction with batch ops
- WP-0.9: 8 architectural constraint enforcement tests
All 40 tests pass, zero warnings.

src/ScadaLink.Commons/Entities/Templates/Template.cs

@@ -0,0 +1,18 @@
+namespace ScadaLink.Commons.Entities.Templates;
+
+public class Template
+{
+    public int Id { get; set; }
+    public string Name { get; set; }
+    public string? Description { get; set; }
+    public int? ParentTemplateId { get; set; }
+    public ICollection<TemplateAttribute> Attributes { get; set; } = new List<TemplateAttribute>();
+    public ICollection<TemplateAlarm> Alarms { get; set; } = new List<TemplateAlarm>();
+    public ICollection<TemplateScript> Scripts { get; set; } = new List<TemplateScript>();
+    public ICollection<TemplateComposition> Compositions { get; set; } = new List<TemplateComposition>();
+
+    public Template(string name)
+    {
+        Name = name ?? throw new ArgumentNullException(nameof(name));
+    }
+}

src/ScadaLink.Commons/Entities/Templates/TemplateAlarm.cs

@@ -0,0 +1,21 @@
+using ScadaLink.Commons.Types.Enums;
+
+namespace ScadaLink.Commons.Entities.Templates;
+
+public class TemplateAlarm
+{
+    public int Id { get; set; }
+    public int TemplateId { get; set; }
+    public string Name { get; set; }
+    public string? Description { get; set; }
+    public int PriorityLevel { get; set; }
+    public bool IsLocked { get; set; }
+    public AlarmTriggerType TriggerType { get; set; }
+    public string? TriggerConfiguration { get; set; }
+    public int? OnTriggerScriptId { get; set; }
+
+    public TemplateAlarm(string name)
+    {
+        Name = name ?? throw new ArgumentNullException(nameof(name));
+    }
+}

src/ScadaLink.Commons/Entities/Templates/TemplateAttribute.cs

@@ -0,0 +1,20 @@
+using ScadaLink.Commons.Types.Enums;
+
+namespace ScadaLink.Commons.Entities.Templates;
+
+public class TemplateAttribute
+{
+    public int Id { get; set; }
+    public int TemplateId { get; set; }
+    public string Name { get; set; }
+    public string? Value { get; set; }
+    public DataType DataType { get; set; }
+    public bool IsLocked { get; set; }
+    public string? Description { get; set; }
+    public string? DataSourceReference { get; set; }
+
+    public TemplateAttribute(string name)
+    {
+        Name = name ?? throw new ArgumentNullException(nameof(name));
+    }
+}

src/ScadaLink.Commons/Entities/Templates/TemplateComposition.cs

@@ -0,0 +1,14 @@
+namespace ScadaLink.Commons.Entities.Templates;
+
+public class TemplateComposition
+{
+    public int Id { get; set; }
+    public int TemplateId { get; set; }
+    public int ComposedTemplateId { get; set; }
+    public string InstanceName { get; set; }
+
+    public TemplateComposition(string instanceName)
+    {
+        InstanceName = instanceName ?? throw new ArgumentNullException(nameof(instanceName));
+    }
+}

src/ScadaLink.Commons/Entities/Templates/TemplateScript.cs

@@ -0,0 +1,21 @@
+namespace ScadaLink.Commons.Entities.Templates;
+
+public class TemplateScript
+{
+    public int Id { get; set; }
+    public int TemplateId { get; set; }
+    public string Name { get; set; }
+    public bool IsLocked { get; set; }
+    public string Code { get; set; }
+    public string? TriggerType { get; set; }
+    public string? TriggerConfiguration { get; set; }
+    public string? ParameterDefinitions { get; set; }
+    public string? ReturnDefinition { get; set; }
+    public TimeSpan? MinTimeBetweenRuns { get; set; }
+
+    public TemplateScript(string name, string code)
+    {
+        Name = name ?? throw new ArgumentNullException(nameof(name));
+        Code = code ?? throw new ArgumentNullException(nameof(code));
+    }
+}