Fix cross app installation (#18151)

# Introduction
- Fixing app dependencyFlatEntityMaps load ( to load current app +
dependent app )
- Fix empty flat entity maps and undefined optimistic override
- Refactor the optimistic rendering to be mutation oriented at
orchestrator level

packages/twenty-server/src/engine/core-modules/application/services/application-manifest-migration.service.ts

@@ -65,6 +65,11 @@ export class ApplicationManifestMigrationService {
 
     const { featureFlagsMap, ...existingAllFlatEntityMaps } = cacheResult;
 
+    const fromAllFlatEntityMaps = getApplicationSubAllFlatEntityMaps({
+      applicationIds: [ownerFlatApplication.id],
+      fromAllFlatEntityMaps: existingAllFlatEntityMaps,
+    });
+
     const toAllUniversalFlatEntityMaps =
       computeApplicationManifestAllUniversalFlatEntityMaps({
         manifest,
@@ -72,20 +77,15 @@ export class ApplicationManifestMigrationService {
         now,
       });
 
-    const fromAllFlatEntityMaps = getApplicationSubAllFlatEntityMaps({
-      applicationIds: [ownerFlatApplication.id],
+    const dependencyAllFlatEntityMaps = getApplicationSubAllFlatEntityMaps({
+      applicationIds:
+        ownerFlatApplication.universalIdentifier ===
+        TWENTY_STANDARD_APPLICATION.universalIdentifier
+          ? [twentyStandardFlatApplication.id]
+          : [ownerFlatApplication.id, twentyStandardFlatApplication.id],
       fromAllFlatEntityMaps: existingAllFlatEntityMaps,
     });
 
-    const dependencyAllFlatEntityMaps =
-      ownerFlatApplication.universalIdentifier ===
-      TWENTY_STANDARD_APPLICATION.universalIdentifier
-        ? undefined
-        : getApplicationSubAllFlatEntityMaps({
-            applicationIds: [twentyStandardFlatApplication.id],
-            fromAllFlatEntityMaps: existingAllFlatEntityMaps,
-          });
-
     const validateAndBuildResult =
       await this.workspaceMigrationValidateBuildAndRunService.validateBuildAndRunWorkspaceMigrationFromTo(
         {

packages/twenty-server/src/engine/core-modules/application/services/application-sync.service.ts

@@ -1,9 +1,9 @@
 import { Injectable, Logger } from '@nestjs/common';
 
+import { ALL_METADATA_NAME } from 'twenty-shared/metadata';
 import { FileFolder } from 'twenty-shared/types';
 import { isDefined } from 'twenty-shared/utils';
 import { PackageJson } from 'type-fest';
-import { ALL_METADATA_NAME } from 'twenty-shared/metadata';
 
 import { ApplicationEntity } from 'src/engine/core-modules/application/application.entity';
 import {