Remove logic function layer (#17697)

## Remove logic function layer

Package.json and yarn.lock are now on the application entity, so the
logic function layer is no longer used except as a legacy source for the
1.17 backfill. This PR removes all layer usage outside of that migration
and keeps only the entity for backfill.

### Summary

- **Kept:** `LogicFunctionLayerEntity` and its table, only used by the
1.17 backfill command to read legacy layer data and backfill application
package files.
- **Removed:** All other layer logic: CRUD, cache, resolvers, services,
DTOs, and frontend types. Logic functions now depend only on the
application for package/dependency context.


### Why Dependencies instead of Source for package files

Package.json and yarn.lock are the application’s dependency set and are
stored under the application in **FileFolder.Dependencies**. The build
service and drivers now read them only from Dependencies; nothing is
written to Source for these files.

packages/twenty-server/src/database/commands/upgrade-version-command/1-17/1-17-migrate-workflow-code-steps.command.ts

@@ -194,7 +194,6 @@ export class MigrateWorkflowCodeStepsCommand extends ActiveOrSuspendedWorkspaces
         name: oldLogicFunction.name,
         description: oldLogicFunction.description ?? undefined,
         timeoutSeconds: oldLogicFunction.timeoutSeconds ?? 300,
-        logicFunctionLayerId: oldLogicFunction.logicFunctionLayerId,
         toolInputSchema: oldLogicFunction.toolInputSchema ?? undefined,
         isTool: oldLogicFunction.isTool ?? false,
       },

packages/twenty-server/src/database/commands/upgrade-version-command/1-17/1-17-seed-workflow-v1-16.command.ts

@@ -1,15 +1,14 @@
 import { Logger } from '@nestjs/common';
 import { InjectRepository } from '@nestjs/typeorm';
 
-import { v4 as uuidv4 } from 'uuid';
 import { Command } from 'nest-commander';
 import { Repository } from 'typeorm';
+import { v4 as uuidv4 } from 'uuid';
 
 import { ActiveOrSuspendedWorkspacesMigrationCommandRunner } from 'src/database/commands/command-runners/active-or-suspended-workspaces-migration.command-runner';
 import { RunOnWorkspaceArgs } from 'src/database/commands/command-runners/workspaces-migration.command-runner';
 import { ApplicationService } from 'src/engine/core-modules/application/services/application.service';
 import { FileStorageService } from 'src/engine/core-modules/file-storage/file-storage.service';
-import { LogicFunctionLayerService } from 'src/engine/core-modules/logic-function/logic-function-layer/services/logic-function-layer.service';
 import { RecordPositionService } from 'src/engine/core-modules/record-position/services/record-position.service';
 import { WorkspaceEntity } from 'src/engine/core-modules/workspace/workspace.entity';
 import { DataSourceService } from 'src/engine/metadata-modules/data-source/data-source.service';
@@ -66,7 +65,6 @@ export class SeedWorkflowV1_16Command extends ActiveOrSuspendedWorkspacesMigrati
     protected readonly globalWorkspaceOrmManager: GlobalWorkspaceOrmManager,
     protected readonly dataSourceService: DataSourceService,
     private readonly applicationService: ApplicationService,
-    private readonly logicFunctionLayerService: LogicFunctionLayerService,
     private readonly fileStorageService: FileStorageService,
     private readonly recordPositionService: RecordPositionService,
   ) {
@@ -421,12 +419,6 @@ export class SeedWorkflowV1_16Command extends ActiveOrSuspendedWorkspacesMigrati
         { workspaceId },
       );
     const applicationId = workspaceCustomFlatApplication.id;
-    const { id: logicFunctionLayerId } =
-      await this.logicFunctionLayerService.createCommonLayer({
-        workspaceId,
-        applicationUniversalIdentifier:
-          workspaceCustomFlatApplication.universalIdentifier,
-      });
     const id = uuidv4();
     const universalIdentifier = uuidv4();
     const now = new Date();
@@ -446,7 +438,6 @@ export class SeedWorkflowV1_16Command extends ActiveOrSuspendedWorkspacesMigrati
       checksum: null,
       toolInputSchema: null,
       isTool: false,
-      logicFunctionLayerId,
       cronTriggerSettings: null,
       databaseEventTriggerSettings: null,
       httpRouteTriggerSettings: null,

packages/twenty-server/src/database/commands/upgrade-version-command/1-17/1-17-upgrade-version-command.module.ts

@@ -16,7 +16,6 @@ import { FeatureFlagEntity } from 'src/engine/core-modules/feature-flag/feature-
 import { FeatureFlagModule } from 'src/engine/core-modules/feature-flag/feature-flag.module';
 import { FileStorageModule } from 'src/engine/core-modules/file-storage/file-storage.module';
 import { FileEntity } from 'src/engine/core-modules/file/entities/file.entity';
-import { CoreLogicFunctionLayerModule } from 'src/engine/core-modules/logic-function/logic-function-layer/logic-function-layer.module';
 import { RecordPositionModule } from 'src/engine/core-modules/record-position/record-position.module';
 import { WorkspaceEntity } from 'src/engine/core-modules/workspace/workspace.entity';
 import { DataSourceModule } from 'src/engine/metadata-modules/data-source/data-source.module';
@@ -58,7 +57,6 @@ import { TaskTargetWorkspaceEntity } from 'src/modules/task/standard-objects/tas
     FieldMetadataModule,
     ObjectMetadataModule,
     ApplicationModule,
-    CoreLogicFunctionLayerModule,
     LogicFunctionModule,
     RecordPositionModule,
     GlobalWorkspaceDataSourceModule,