Refactor workflow-logic-function-interaction (#17699)

# Refactor workflow–logic function interaction

## Why

Workflow code steps and standalone logic functions shared the same build
layer and DB layer, which blurred two use cases: code steps belong to a
workflow version; standalone functions are deployable units. That made
workflow code steps harder to own and evolve.

## Goal

Treat code steps as **workflow-owned**: build and run them in workflow
context, and expose workflow-scoped APIs so the editor can load, test,
and save code step source without going through the generic
logic-function layer.

packages/twenty-server/src/engine/metadata-modules/logic-function/logic-function.module.ts

@@ -12,6 +12,7 @@ import { FeatureFlagModule } from 'src/engine/core-modules/feature-flag/feature-
 import { FileUploadModule } from 'src/engine/core-modules/file/file-upload/file-upload.module';
 import { FileModule } from 'src/engine/core-modules/file/file.module';
 import { LogicFunctionExecutorModule } from 'src/engine/core-modules/logic-function/logic-function-executor/logic-function-executor.module';
+import { LogicFunctionSourceBuilderModule } from 'src/engine/core-modules/logic-function/logic-function-source-builder/logic-function-source-builder.module';
 import { SecretEncryptionModule } from 'src/engine/core-modules/secret-encryption/secret-encryption.module';
 import { ThrottlerModule } from 'src/engine/core-modules/throttler/throttler.module';
 import { WorkspaceManyOrAllFlatEntityMapsCacheModule } from 'src/engine/metadata-modules/flat-entity/services/workspace-many-or-all-flat-entity-maps-cache.module';
@@ -40,6 +41,7 @@ import { WorkspaceMigrationModule } from 'src/engine/workspace-manager/workspace
     WorkspaceMigrationModule,
     LogicFunctionLayerModule,
     LogicFunctionExecutorModule,
+    LogicFunctionSourceBuilderModule,
     SubscriptionsModule,
     WorkspaceCacheModule,
     TokenModule,