chore: expand core changeset to cover removed v3 message catalogs

Author: ericallam

.changeset/retire-v3-zod-namespace.md

@@ -2,4 +2,4 @@
 "@trigger.dev/core": patch
 ---
 
-Removed the unused `@trigger.dev/core/v3/zodNamespace` export, which was only used by the retired v3 engine.
+Removed unused v3 (engine V1) exports that are no longer referenced now that the v3 engine is retired: the `@trigger.dev/core/v3/zodNamespace` subpath and the legacy v3 socket message catalogs (coordinator, provider, shared-queue, prod-worker, and background-worker websocket).