Multiple operations on webhooks (#7807)

fixes #7792 

WIP :)



https://github.com/user-attachments/assets/91f16744-c002-4f24-9cdd-cff79743cab1

---------

Co-authored-by: martmull <martmull@hotmail.fr>

packages/twenty-server/src/engine/metadata-modules/field-metadata/dtos/default-value.input.ts

@@ -189,3 +189,9 @@ export class FieldMetadataDefaultValuePhones {
   @IsObject()
   additionalPhones: object | null;
 }
+
+export class FieldMetadataDefaultArray {
+  @ValidateIf((_object, value) => value !== null)
+  @IsArray()
+  value: string[] | null;
+}