[OBJECT_CACHE_FLUSH_REQUIRED_WHEN_RELEASED] Remove FlatObjectMetadata custom fieldMetadataIds fk aggregator property (#17438)

# Introduction
Currently refactoring `flatEntity` typing, encountering some tsc errors
due to this fk aggregator custom override
It shall now follow generic pattern leading to be named `fieldIds`

Needs to flush object cache when released

packages/twenty-server/src/engine/core-modules/open-api/utils/__tests__/components.utils.spec.ts

@@ -13,7 +13,7 @@ describe('computeSchemaComponents', () => {
     const flatObjectMetadata: FlatObjectMetadata = {
       ...objectMetadataItemMock,
       universalIdentifier: 'objectName',
-      fieldMetadataIds: objectMetadataItemMock.fields.map((f) => f.id),
+      fieldIds: objectMetadataItemMock.fields.map((f) => f.id),
     } as any;
 
     const flatFieldMetadataMaps = {
@@ -29,7 +29,7 @@ describe('computeSchemaComponents', () => {
       nameSingular: 'relationTargetObject',
       namePlural: 'relationTargetObjects',
       universalIdentifier: 'relationTargetObject',
-      fieldMetadataIds: [],
+      fieldIds: [],
     } as any;
 
     const flatObjectMetadataMaps = {
@@ -858,7 +858,7 @@ describe('computeSchemaComponents', () => {
       nameSingular: 'objectName',
       namePlural: 'objectsName',
       universalIdentifier: 'objectName',
-      fieldMetadataIds: [field.id],
+      fieldIds: [field.id],
     } as any;
 
     const flatFieldMetadataMaps = {

packages/twenty-server/src/engine/core-modules/open-api/utils/components.utils.ts

@@ -236,7 +236,7 @@ export const computeSchemaComponents = (
       const flatFieldMetadatas =
         findManyFlatEntityByIdInFlatEntityMapsOrThrow<FlatFieldMetadata>({
           flatEntityMaps: flatFieldMetadataMaps,
-          flatEntityIds: item.fieldMetadataIds,
+          flatEntityIds: item.fieldIds,
         });
 
       schemas[capitalize(item.nameSingular)] = computeSchemaComponent({