feat: complete production workflow migration

docs/history/product-commerce/launchers_reference/README.md

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+# Launcher provenance only
+
+These launchers preserve the arguments and sequencing discovered during the
+read-only audit. Their project-root literals were replaced by the inert
+`GYXX_RUNTIME_ROOT` placeholder during migration.
+
+Do not register or invoke these files as production entry points. Final tasks
+must call the native `gyxx-flow` CLI and its workflow registry.