feat(sitecall-audit): add SourceNode to SiteCallOperational + SiteCall entity

src/ScadaLink.AuditLog/Site/Telemetry/CachedCallLifecycleBridge.cs

@@ -162,6 +162,9 @@ public sealed class CachedCallLifecycleBridge : ICachedCallLifecycleObserver
                 Channel: context.Channel,
                 Target: context.Target,
                 SourceSite: context.SourceSite,
+                // SourceNode: stamped by Task 14 once the bridge gets an
+                // INodeIdentityProvider; null until then.
+                SourceNode: null,
                 Status: operationalStatus,
                 RetryCount: context.RetryCount,
                 LastError: lastError,

src/ScadaLink.Commons/Entities/Audit/SiteCall.cs

@@ -30,6 +30,15 @@ public sealed record SiteCall
     /// <summary>Site id that submitted the cached call.</summary>
     public required string SourceSite { get; init; }
 
+    /// <summary>
+    /// The cluster node on which the cached call was emitted — <c>node-a</c> /
+    /// <c>node-b</c> for site rows (qualified by <see cref="SourceSite"/>),
+    /// <c>central-a</c> / <c>central-b</c> for central-originated rows. Stamped
+    /// by the emitting node from <c>INodeIdentityProvider</c>; nullable so
+    /// reconciled rows from a node that has since been retired don't block ingest.
+    /// </summary>
+    public string? SourceNode { get; init; }
+
     /// <summary>
     /// Lifecycle status — string form of
     /// <see cref="ScadaLink.Commons.Types.Enums.AuditStatus"/>. Monotonic: later rank

src/ScadaLink.Commons/Types/SiteCallOperational.cs

@@ -21,6 +21,13 @@ namespace ScadaLink.Commons.Types;
 /// </param>
 /// <param name="Target">Human-readable target (e.g. <c>"ERP.GetOrder"</c>).</param>
 /// <param name="SourceSite">Site id that submitted the cached call.</param>
+/// <param name="SourceNode">
+/// The cluster node on which the cached call was emitted — <c>node-a</c> / <c>node-b</c>
+/// for site rows (qualified by <paramref name="SourceSite"/>), <c>central-a</c> /
+/// <c>central-b</c> for central-originated rows. Stamped by the emitting node from
+/// <c>INodeIdentityProvider</c>; nullable so reconciled rows from a node that has since
+/// been retired don't block ingest.
+/// </param>
 /// <param name="Status">
 /// Lifecycle status — string form of <see cref="ScadaLink.Commons.Types.Enums.AuditStatus"/>:
 /// <c>Submitted</c>, <c>Retrying</c>, <c>Attempted</c>, <c>Delivered</c>,
@@ -37,6 +44,7 @@ public sealed record SiteCallOperational(
     string Channel,
     string Target,
     string SourceSite,
+    string? SourceNode,
     string Status,
     int RetryCount,
     string? LastError,

src/ScadaLink.SiteRuntime/Scripts/ScriptRuntimeContext.cs

@@ -648,6 +648,9 @@ public class ScriptRuntimeContext
                         Channel: "ApiOutbound",
                         Target: target,
                         SourceSite: _siteId,
+                        // SourceNode: stamped by Task 14 once the script context
+                        // gets an INodeIdentityProvider; null until then.
+                        SourceNode: null,
                         Status: "Submitted",
                         RetryCount: 0,
                         LastError: null,
@@ -766,6 +769,9 @@ public class ScriptRuntimeContext
                         Channel: "ApiOutbound",
                         Target: target,
                         SourceSite: _siteId,
+                        // SourceNode: stamped by Task 14 once the script context
+                        // gets an INodeIdentityProvider; null until then.
+                        SourceNode: null,
                         Status: "Attempted",
                         // RetryCount stays 0 — the operation never reached the
                         // S&F retry sweep, so no retries were performed.
@@ -833,6 +839,9 @@ public class ScriptRuntimeContext
                         Channel: "ApiOutbound",
                         Target: target,
                         SourceSite: _siteId,
+                        // SourceNode: stamped by Task 14 once the script context
+                        // gets an INodeIdentityProvider; null until then.
+                        SourceNode: null,
                         Status: operationalTerminalStatus,
                         RetryCount: 0,
                         LastError: result.Success ? null : result.ErrorMessage,
@@ -1243,6 +1252,9 @@ public class ScriptRuntimeContext
                         Channel: "DbOutbound",
                         Target: target,
                         SourceSite: _siteId,
+                        // SourceNode: stamped by Task 14 once the script context
+                        // gets an INodeIdentityProvider; null until then.
+                        SourceNode: null,
                         Status: "Submitted",
                         RetryCount: 0,
                         LastError: null,