Extract field metadata build out of object metadata build (#14763)

# Introduction

Extracting the legacy fields build and dispatch out of the object one to
follow the generic flat entity build, also update caches entries for
object

## Main tasks
- flat field map cache
- flat field builder
- refactored the dispatch matrix to return flat entity maps instead of
flat entity arrays
- orchestrator aggregator
- removing legacy code
- making universal identifier aka standardId of standard field for
custom object deterministically dynamic
- perfs debug logs for v2

## TODO
- [x] Refactor the generic entity builder to be dependency flat maps in
order to main foreign keys list in flat parent
- [x] Refactor the flat object metadata to contain the array of related
fields and avoid costy find object fields
- [ ] Improve the create field handler to handle multiple field at once
- [ ] Refactor the dispatch to embbed the comparison
- [ ] Improve perf by extracting from elements out of existing
- [ ] Fix the labelIdentifierId validators on object before field
creation ( integ tests are in failing mode )

## Debug logs snippet

```ts
[EntityBuilder fieldMetadata] matrix computation: 0.027ms
[EntityBuilder fieldMetadata] creation validation: 0.001ms
[EntityBuilder fieldMetadata] deletion validation: 0.293ms
[EntityBuilder fieldMetadata] update validation: 0.006ms
[EntityBuilder fieldMetadata] entity processing: 0.363ms
[EntityBuilder fieldMetadata] validateAndBuild: 0.455ms
[EntityBuilder index] matrix computation: 0.005ms
[EntityBuilder index] creation validation: 0.001ms
[EntityBuilder index] deletion validation: 0.146ms
[EntityBuilder index] update validation: 0.004ms
[EntityBuilder index] entity processing: 0.199ms
[EntityBuilder index] validateAndBuild: 0.228ms
[Runner] Initial cache retrieval: 0.549ms
[BaseWorkspaceMigrationRunnerActionHandlerService] delete_index executeForWorkspaceSchema: 11.665ms
[BaseWorkspaceMigrationRunnerActionHandlerService] delete_index executeForMetadata: 12.864ms
[BaseWorkspaceMigrationRunnerActionHandlerService] delete_field executeForWorkspaceSchema: 1.476ms
[BaseWorkspaceMigrationRunnerActionHandlerService] delete_field executeForMetadata: 6.816ms
[BaseWorkspaceMigrationRunnerActionHandlerService] delete_field executeForWorkspaceSchema: 0.062ms
[BaseWorkspaceMigrationRunnerActionHandlerService] delete_field executeForMetadata: 0.889ms
[Runner] Transaction execution: 23.434ms
[Runner] Cache invalidation: 316.662ms
[Runner] Total execution: 340.767ms
```
As you can see cache invalidation is way to long, we could replace the
cache by the optimistic in the end

packages/twenty-server/src/engine/metadata-modules/flat-object-metadata/validators/utils/validate-flat-object-metadata-identifiers.util.ts

@@ -4,20 +4,28 @@ import {
   isLabelIdentifierFieldMetadataTypes,
 } from 'twenty-shared/utils';
 
+import { type FlatFieldMetadata } from 'src/engine/metadata-modules/flat-field-metadata/types/flat-field-metadata.type';
 import { type FlatObjectMetadataValidationError } from 'src/engine/metadata-modules/flat-object-metadata/types/flat-object-metadata-validation-error.type';
 import { type FlatObjectMetadata } from 'src/engine/metadata-modules/flat-object-metadata/types/flat-object-metadata.type';
 import { ObjectMetadataExceptionCode } from 'src/engine/metadata-modules/object-metadata/object-metadata.exception';
 
-export const validateFlatObjectMetadataIdentifiers = (
-  flatObjectMetadata: FlatObjectMetadata,
-) => {
+export const validateFlatObjectMetadataIdentifiers = ({
+  flatObjectMetadata,
+  objectFlatFieldMetadatas,
+}: {
+  flatObjectMetadata: Pick<
+    FlatObjectMetadata,
+    'labelIdentifierFieldMetadataId' | 'imageIdentifierFieldMetadataId'
+  >;
+  objectFlatFieldMetadatas: FlatFieldMetadata[];
+}) => {
   const errors: FlatObjectMetadataValidationError[] = [];
 
   const { labelIdentifierFieldMetadataId, imageIdentifierFieldMetadataId } =
     flatObjectMetadata;
 
   if (isDefined(labelIdentifierFieldMetadataId)) {
-    const flatFieldMetadata = flatObjectMetadata.flatFieldMetadatas.find(
+    const flatFieldMetadata = objectFlatFieldMetadatas.find(
       (flatFieldMetadata) =>
         flatFieldMetadata.id === labelIdentifierFieldMetadataId,
     );
@@ -40,7 +48,7 @@ export const validateFlatObjectMetadataIdentifiers = (
   }
 
   if (isDefined(imageIdentifierFieldMetadataId)) {
-    const relatedFlatFieldMetadata = flatObjectMetadata.flatFieldMetadatas.find(
+    const relatedFlatFieldMetadata = objectFlatFieldMetadatas.find(
       (flatFieldMetadata) =>
         flatFieldMetadata.id === imageIdentifierFieldMetadataId,
     );