fea(providers): locking postgres (#9545)

Co-authored-by: Adrien de Peretti <25098370+adrien2p@users.noreply.github.com>

packages/modules/providers/locking-postgres/src/index.ts

@@ -0,0 +1,8 @@
+import { ModuleProvider, Modules } from "@medusajs/framework/utils"
+import { PostgresAdvisoryLockProvider } from "./services/advisory-lock"
+
+const services = [PostgresAdvisoryLockProvider]
+
+export default ModuleProvider(Modules.LOCKING, {
+  services,
+})