feat(commons/transport): ScriptArtifactsChanged invalidation contract + post-commit publish from bundle import (consumer lands in plan 06)

New Commons seam: ScriptArtifactsChanged record + ScriptArtifactKinds + the
IScriptArtifactChangeBus pub/sub interface. Host ships InProcessScriptArtifactChangeBus
(lock-free copy-on-write, swallow-and-log per subscriber) registered as a central-role
singleton. BundleImporter gains an optional IScriptArtifactChangeBus? and, AFTER
tx.CommitAsync, publishes one notification per script-bearing kind (ApiMethod/
SharedScript/Template) whose resolution was Overwrite/Rename, using post-resolution
names — fully guarded so a bad subscriber can't fail a committed import. Contract +
plan-06 handoff table documented. No consumer yet (additive; publisher is correct).

Claude-Session: https://claude.ai/code/session_01MtdgwpEeCUn6cUA5f1LMPj

src/ZB.MOM.WW.ScadaBridge.Commons/Interfaces/Scripting/IScriptArtifactChangeBus.cs

@@ -0,0 +1,27 @@
+using ZB.MOM.WW.ScadaBridge.Commons.Messages.Scripting;
+
+namespace ZB.MOM.WW.ScadaBridge.Commons.Interfaces.Scripting;
+
+/// <summary>
+/// In-process, per-node publish/subscribe seam for
+/// <see cref="ScriptArtifactsChanged"/>. Producers (e.g. the Transport bundle
+/// importer, the ManagementActor script-editing paths) publish AFTER their mutating
+/// transaction commits; consumers (e.g. the Inbound API compiled-handler cache)
+/// subscribe and evict.
+/// <para>
+/// A conforming implementation MUST swallow-and-log any exception thrown by a
+/// subscriber's handler — a misbehaving consumer must never fault a producer's
+/// commit path.
+/// </para>
+/// </summary>
+public interface IScriptArtifactChangeBus
+{
+    /// <summary>Publishes a change notification to every current subscriber. Never throws on a subscriber fault.</summary>
+    /// <param name="notification">The change notification to deliver.</param>
+    void Publish(ScriptArtifactsChanged notification);
+
+    /// <summary>Subscribes a handler; dispose the returned token to unsubscribe.</summary>
+    /// <param name="handler">The handler invoked for each published notification.</param>
+    /// <returns>A disposable that removes the subscription when disposed.</returns>
+    IDisposable Subscribe(Action<ScriptArtifactsChanged> handler);
+}