Migrate standard objects (#2439)

* Migrate standard objects

* Add migrations

* fix relation

* fix: register RelationMetadataType enum

* fix: correctly fix null relation

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Co-authored-by: corentin <corentin@twenty.com>
Co-authored-by: Jérémy Magrin <jeremy.magrin@gmail.com>

server/src/metadata/relation-metadata/dtos/create-relation.input.ts

@@ -17,7 +17,7 @@ import { RelationMetadataType } from 'src/metadata/relation-metadata/relation-me
 export class CreateRelationInput {
   @IsEnum(RelationMetadataType)
   @IsNotEmpty()
-  @Field()
+  @Field(() => RelationMetadataType)
   relationType: RelationMetadataType;
 
   @IsUUID()

server/src/metadata/relation-metadata/dtos/relation-metadata.dto.ts

@@ -29,7 +29,7 @@ export class RelationMetadataDTO {
   @IDField(() => ID)
   id: string;
 
-  @Field()
+  @Field(() => RelationMetadataType)
   relationType: RelationMetadataType;
 
   @Field()