Refactor flat entity maps to be universal oriented (#17665)

# Introduction
In preparation of the workspace agnostic builder, we're migrating
`FlatEntityMaps` to be universal identifier oriented and based
As in the builder context there're won't be any ids at all
Please also note that the FlatEntity is a UniversalFlatEntity superset

From
```ts
import { type SyncableFlatEntity } from 'src/engine/metadata-modules/flat-entity/types/flat-entity-from.type';

export type FlatEntityMaps<T extends SyncableFlatEntity> = {
  byId: Partial<Record<string, T>>;
  idByUniversalIdentifier: Partial<Record<string, string>>;
  universalIdentifiersByApplicationId: Partial<Record<string, string[]>>;
};
```

To
```ts
export type FlatEntityMaps<
  T extends SyncableFlatEntity | UniversalSyncableFlatEntity,
> = {
  byUniversalIdentifier: Partial<Record<string, T>>;
  universalIdentifierById: Partial<Record<string, string>>;
  universalIdentifiersByApplicationId: Partial<Record<string, string[]>>; // this might make more sense to be migrated to universalIdentifiersByApplicationUniversalIdentifier but it's the main topic of this PR
};
```

## Low level maps tools
Had to refactor find | create | delete | replace | find-many | get-sub
tools ( through mutations and or throw equivalent )

packages/twenty-server/src/modules/workflow/workflow-executor/utils/resolve-rich-text-fields-in-record.util.ts

@@ -2,6 +2,7 @@ import { isString } from 'class-validator';
 import { FieldMetadataType } from 'twenty-shared/types';
 import { isDefined, resolveRichTextVariables } from 'twenty-shared/utils';
 
+import { findManyFlatEntityByIdInFlatEntityMaps } from 'src/engine/metadata-modules/flat-entity/utils/find-many-flat-entity-by-id-in-flat-entity-maps.util';
 import { type ObjectMetadataInfo } from 'src/modules/workflow/common/workspace-services/workflow-common.workspace-service';
 
 export const resolveRichTextFieldsInRecord = (
@@ -11,8 +12,10 @@ export const resolveRichTextFieldsInRecord = (
 ): Record<string, unknown> => {
   const { flatObjectMetadata, flatFieldMetadataMaps } = objectMetadataInfo;
 
-  const richTextFieldNames = flatObjectMetadata.fieldIds
-    .map((fieldId) => flatFieldMetadataMaps.byId[fieldId])
+  const richTextFieldNames = findManyFlatEntityByIdInFlatEntityMaps({
+    flatEntityIds: flatObjectMetadata.fieldIds,
+    flatEntityMaps: flatFieldMetadataMaps,
+  })
     .filter((field) => field?.type === FieldMetadataType.RICH_TEXT_V2)
     .map((field) => field?.name)
     .filter(isDefined);

packages/twenty-server/src/modules/workflow/workflow-executor/workflow-actions/logic-function/logic-function.workflow-action.ts

@@ -5,6 +5,7 @@ import { resolveInput } from 'twenty-shared/utils';
 import { type WorkflowAction } from 'src/modules/workflow/workflow-executor/interfaces/workflow-action.interface';
 
 import { LogicFunctionExecutorService } from 'src/engine/core-modules/logic-function/logic-function-executor/services/logic-function-executor.service';
+import { findFlatEntityByIdInFlatEntityMaps } from 'src/engine/metadata-modules/flat-entity/utils/find-flat-entity-by-id-in-flat-entity-maps.util';
 import { WorkspaceManyOrAllFlatEntityMapsCacheService } from 'src/engine/metadata-modules/flat-entity/services/workspace-many-or-all-flat-entity-maps-cache.service';
 import {
   WorkflowStepExecutorException,
@@ -57,8 +58,10 @@ export class LogicFunctionWorkflowAction implements WorkflowAction {
           },
         );
 
-      const logicFunction =
-        flatLogicFunctionMaps.byId[workflowActionInput.logicFunctionId];
+      const logicFunction = findFlatEntityByIdInFlatEntityMaps({
+        flatEntityId: workflowActionInput.logicFunctionId,
+        flatEntityMaps: flatLogicFunctionMaps,
+      });
 
       if (!logicFunction) {
         throw new WorkflowStepExecutorException(

packages/twenty-server/src/modules/workflow/workflow-executor/workflow-actions/record-crud/find-records.workflow-action.ts

@@ -17,6 +17,7 @@ import {
   RecordCrudExceptionCode,
 } from 'src/engine/core-modules/record-crud/exceptions/record-crud.exception';
 import { FindRecordsService } from 'src/engine/core-modules/record-crud/services/find-records.service';
+import { findFlatEntityByIdInFlatEntityMaps } from 'src/engine/metadata-modules/flat-entity/utils/find-flat-entity-by-id-in-flat-entity-maps.util';
 import { WorkflowCommonWorkspaceService } from 'src/modules/workflow/common/workspace-services/workflow-common.workspace-service';
 import {
   WorkflowStepExecutorException,
@@ -73,7 +74,10 @@ export class FindRecordsWorkflowAction implements WorkflowAction {
 
     const fields = flatObjectMetadata.fieldIds
       .map((fieldId) => {
-        const field = flatFieldMetadataMaps.byId[fieldId];
+        const field = findFlatEntityByIdInFlatEntityMaps({
+          flatEntityId: fieldId,
+          flatEntityMaps: flatFieldMetadataMaps,
+        });
 
         if (!field) {
           return null;