Merge pull request #16 from typeonce-dev/codex/improve-type-errors

Improve compile-time machine diagnostics

Author: SandroMaglione

.changeset/clear-machines-diagnose.md

@@ -0,0 +1,7 @@
+---
+"@typeonce/effect-machine": patch
+---
+
+Improve compile-time diagnostics for invalid state definitions, event protocols,
+and handler configurations. Errors now retain the relevant configuration shape
+and state path while preserving existing inference and type safety.