chore: Ensure the events are emitted with the same shape all accross (#8063)

* chore: Ensure the events are emitted with the same shape all accross

* fixes:

* rm unsues type

* types

* fix tests

packages/core/types/src/event-bus/common.ts

@@ -1,8 +1,7 @@
 import { Context } from "../shared-context"
 
 export type Subscriber<TData = unknown> = (
-  data: TData,
-  eventName: string
+  data: MessageBody<TData>
 ) => Promise<void>
 
 export type SubscriberContext = {
@@ -14,11 +13,6 @@ export type SubscriberDescriptor = {
   subscriber: Subscriber
 }
 
-export type EventHandler<TData = unknown> = (
-  data: TData,
-  eventName: string
-) => Promise<void>
-
 export type EventMetadata = Record<string, unknown> & {
   eventGroupId?: string
 }

packages/core/utils/src/modules-sdk/medusa-service.ts

@@ -265,6 +265,7 @@ export function MedusaService<
               data: isString(primaryKeyValue)
                 ? { id: primaryKeyValue }
                 : primaryKeyValue,
+              metadata: { source: "", action: "", object: "" },
             }))
           )
         }