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.Host/Program.cs

@@ -90,6 +90,13 @@ try
         // TransportOptions from ScadaBridge:Transport via BindConfiguration; no
         // explicit Configure needed.
         builder.Services.AddTransport();
+        // Script-artifact invalidation bus (#05-T14): in-process, per-node pub/sub
+        // for ScriptArtifactsChanged. The Transport bundle importer publishes
+        // post-commit; the Inbound API compiled-handler cache subscribes as the
+        // consumer (wired in plan 06). Central-only — it lives beside the importer.
+        builder.Services.AddSingleton<
+            ZB.MOM.WW.ScadaBridge.Commons.Interfaces.Scripting.IScriptArtifactChangeBus,
+            ZB.MOM.WW.ScadaBridge.Host.Services.InProcessScriptArtifactChangeBus>();
         // Audit Log — central node owns the AuditLogIngestActor singleton +
         // IAuditLogRepository. The site writer chain is still registered (lazy
         // singletons) but is never resolved on a central node.