fea(providers): locking postgres (#9545)

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

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

@@ -0,0 +1 @@
+export { default as Locking } from "./locking"

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

@@ -0,0 +1,32 @@
+import { generateEntityId } from "@medusajs/framework/utils"
+import {
+  BeforeCreate,
+  Entity,
+  OnInit,
+  PrimaryKey,
+  Property,
+} from "@mikro-orm/core"
+
+@Entity({ tableName: "locking" })
+class Locking {
+  @PrimaryKey({ columnType: "text" })
+  id!: string
+
+  @Property({ columnType: "text", nullable: true })
+  owner_id: string | null = null
+
+  @Property({ columnType: "timestamptz", nullable: true })
+  expiration: Date | null = null
+
+  @BeforeCreate()
+  onCreate() {
+    this.id = generateEntityId(this.id, "lk")
+  }
+
+  @OnInit()
+  onInit() {
+    this.id = generateEntityId(this.id, "lk")
+  }
+}
+
+export default Locking