Add a new to property to the emit task, used to configure an additional endpoint to publish the configured event to

Closes serverlessworkflow#1026

Signed-off-by: Charles d'Avernas <[email protected]>

Author: cdavernas

dsl-reference.md

@@ -508,6 +508,7 @@ Allows workflows to publish events to event brokers or messaging systems, facili
 | Name | Type | Required | Description |
 |:--|:---:|:---:|:---|
 | emit.event | [`eventProperties`](#event-properties) | `yes` | Defines the event to emit. |
+| emit.to | [`endpoint`](#endpoint) | `no` | Specifies an additional endpoint for emitting the event. While the runtime's default cloud event endpoint remains the primary destination, setting this property ensures that the event is also published to the specified endpoint. Ideally, this property is left unset so that event delivery relies solely on the runtime's configured endpoint, but when provided, the event will be sent to both endpoints concurrently. |
 
 ##### Examples
 

examples/emit-additional-sink.yaml

@@ -0,0 +1,20 @@
+document:
+  dsl: '1.0.0-alpha5'
+  namespace: test
+  name: emit
+  version: '0.1.0'
+do:
+  - emitEvent:
+      emit:
+        event:
+          with:
+            source: https://petstore.com
+            type: com.petstore.order.placed.v1
+            data:
+              client:
+                firstName: Cruella
+                lastName: de Vil
+              items:
+                - breed: dalmatian
+                  quantity: 101
+        to: https://additional-cloud-event-sink.com/pub

schema/workflow.yaml

@@ -1,4 +1,4 @@
-$id: https://serverlessworkflow.io/schemas/1.0.0-alpha5/workflow.yaml
+$id: https://serverlessworkflow.io/schemas/1.0.0-alpha6/workflow.yaml
 $schema: https://json-schema.org/draft/2020-12/schema
 description: Serverless Workflow DSL - Workflow Schema.
 type: object
@@ -482,6 +482,10 @@ $defs:
                 description: Defines the properties of event to emit.
                 required: [ source, type ]
             additionalProperties: true
+          to:
+            $ref: '#/$defs/endpoint'
+            title: EmitEndpointDefinition
+            description: Defines the additional endpoint, if any, to emit the event to.
         required: [ event ]
   forTask:
     type: object