Remove DataSourceService and clean up datasource migration logic (#19532)

## Summary

- **Drop the `objectMetadata.dataSourceId` foreign key and index** via a
1-22 fast instance command — column kept nullable for data preservation
- **Delete `DataSourceService`, `DataSourceModule`, and
`DataSourceException`** — all code now uses `workspace.databaseSchema`
directly
- **Remove `IS_DATASOURCE_MIGRATED` feature flag** from default flags
and all branching logic
- **Simplify workspace/object creation pipelines** —
`WorkspaceManagerService`, `DevSeederService`, and the object creation
action handler no longer route through `DataSourceService`
- **Keep `DataSourceEntity` and the `dataSource` table** for historical
data — entity stripped of all ORM relations

packages/twenty-server/src/modules/calendar/calendar-event-import-manager/calendar-event-import-manager.module.ts

@@ -6,7 +6,6 @@ import { FeatureFlagEntity } from 'src/engine/core-modules/feature-flag/feature-
 import { FeatureFlagModule } from 'src/engine/core-modules/feature-flag/feature-flag.module';
 import { MetricsModule } from 'src/engine/core-modules/metrics/metrics.module';
 import { WorkspaceEntity } from 'src/engine/core-modules/workspace/workspace.entity';
-import { DataSourceEntity } from 'src/engine/metadata-modules/data-source/data-source.entity';
 import { UserWorkspaceEntity } from 'src/engine/core-modules/user-workspace/user-workspace.entity';
 import { CalendarChannelEntity } from 'src/engine/metadata-modules/calendar-channel/entities/calendar-channel.entity';
 import { ConnectedAccountEntity } from 'src/engine/metadata-modules/connected-account/entities/connected-account.entity';
@@ -50,7 +49,6 @@ import { RefreshTokensManagerModule } from 'src/modules/connected-account/refres
     TypeOrmModule.forFeature([
       FeatureFlagEntity,
       WorkspaceEntity,
-      DataSourceEntity,
       CalendarChannelEntity,
       ConnectedAccountEntity,
       UserWorkspaceEntity,

packages/twenty-server/src/modules/messaging/message-cleaner/messaging-message-cleaner.module.ts

@@ -4,7 +4,6 @@ import { TypeOrmModule } from '@nestjs/typeorm';
 import { WorkspaceIteratorModule } from 'src/database/commands/command-runners/workspace-iterator.module';
 import { FeatureFlagModule } from 'src/engine/core-modules/feature-flag/feature-flag.module';
 import { WorkspaceEntity } from 'src/engine/core-modules/workspace/workspace.entity';
-import { DataSourceModule } from 'src/engine/metadata-modules/data-source/data-source.module';
 import { MessageChannelEntity } from 'src/engine/metadata-modules/message-channel/entities/message-channel.entity';
 import { MessagingCommonModule } from 'src/modules/messaging/common/messaging-common.module';
 import { MessagingMessageCleanerRemoveOrphansCommand } from 'src/modules/messaging/message-cleaner/commands/messaging-message-clearner-remove-orphans.command';
@@ -19,7 +18,6 @@ import { MessagingMessageCleanerService } from 'src/modules/messaging/message-cl
 @Module({
   imports: [
     TypeOrmModule.forFeature([WorkspaceEntity]),
-    DataSourceModule,
     FeatureFlagModule,
     MessagingCommonModule,
     TypeOrmModule.forFeature([MessageChannelEntity]),

packages/twenty-server/src/modules/messaging/message-folder-manager/messaging-folder-sync-manager.module.ts

@@ -3,7 +3,6 @@ import { TypeOrmModule } from '@nestjs/typeorm';
 
 import { FeatureFlagModule } from 'src/engine/core-modules/feature-flag/feature-flag.module';
 import { WorkspaceEntity } from 'src/engine/core-modules/workspace/workspace.entity';
-import { DataSourceModule } from 'src/engine/metadata-modules/data-source/data-source.module';
 import { MessageFolderEntity } from 'src/engine/metadata-modules/message-folder/entities/message-folder.entity';
 import { WorkspaceDataSourceModule } from 'src/engine/workspace-datasource/workspace-datasource.module';
 import { OAuth2ClientManagerModule } from 'src/modules/connected-account/oauth2-client-manager/oauth2-client-manager.module';
@@ -20,7 +19,6 @@ import { MessagingMicrosoftDriverModule } from 'src/modules/messaging/message-im
   imports: [
     FeatureFlagModule,
     WorkspaceDataSourceModule,
-    DataSourceModule,
     TypeOrmModule.forFeature([WorkspaceEntity, MessageFolderEntity]),
     OAuth2ClientManagerModule,
     MessagingGmailDriverModule,

packages/twenty-server/src/modules/messaging/message-import-manager/crons/jobs/messaging-messages-import.cron.job.ts

@@ -13,10 +13,6 @@ import { Processor } from 'src/engine/core-modules/message-queue/decorators/proc
 import { MessageQueue } from 'src/engine/core-modules/message-queue/message-queue.constants';
 import { MessageQueueService } from 'src/engine/core-modules/message-queue/services/message-queue.service';
 import { WorkspaceEntity } from 'src/engine/core-modules/workspace/workspace.entity';
-import {
-  DataSourceException,
-  DataSourceExceptionCode,
-} from 'src/engine/metadata-modules/data-source/data-source.exception';
 import {
   MessagingMessagesImportJob,
   type MessagingMessagesImportJobData,
@@ -81,9 +77,8 @@ export class MessagingMessagesImportCronJob {
                 id: activeWorkspace.id,
               },
             });
-            throw new DataSourceException(
+            throw new Error(
               'Workspace schema not found while the workspace is still active',
-              DataSourceExceptionCode.DATA_SOURCE_NOT_FOUND,
             );
           }
         } else {

packages/twenty-server/src/modules/messaging/message-import-manager/messaging-import-manager.module.ts

@@ -4,7 +4,6 @@ import { TypeOrmModule } from '@nestjs/typeorm';
 import { FeatureFlagModule } from 'src/engine/core-modules/feature-flag/feature-flag.module';
 import { UserWorkspaceEntity } from 'src/engine/core-modules/user-workspace/user-workspace.entity';
 import { WorkspaceEntity } from 'src/engine/core-modules/workspace/workspace.entity';
-import { DataSourceEntity } from 'src/engine/metadata-modules/data-source/data-source.entity';
 import { MessageChannelEntity } from 'src/engine/metadata-modules/message-channel/entities/message-channel.entity';
 import { MessageFolderEntity } from 'src/engine/metadata-modules/message-folder/entities/message-folder.entity';
 import { ObjectMetadataEntity } from 'src/engine/metadata-modules/object-metadata/object-metadata.entity';
@@ -65,7 +64,6 @@ import { MessagingMonitoringModule } from 'src/modules/messaging/monitoring/mess
     MessagingCommonModule,
     TypeOrmModule.forFeature([
       WorkspaceEntity,
-      DataSourceEntity,
       ObjectMetadataEntity,
       MessageChannelEntity,
       MessageFolderEntity,

packages/twenty-server/src/modules/messaging/monitoring/messaging-monitoring.module.ts

@@ -3,7 +3,6 @@ import { TypeOrmModule } from '@nestjs/typeorm';
 
 import { AuditModule } from 'src/engine/core-modules/audit/audit.module';
 import { WorkspaceEntity } from 'src/engine/core-modules/workspace/workspace.entity';
-import { DataSourceEntity } from 'src/engine/metadata-modules/data-source/data-source.entity';
 import { MessageChannelEntity } from 'src/engine/metadata-modules/message-channel/entities/message-channel.entity';
 import { MessagingCommonModule } from 'src/modules/messaging/common/messaging-common.module';
 import { MessagingMessageChannelSyncStatusMonitoringCronCommand } from 'src/modules/messaging/monitoring/crons/commands/messaging-message-channel-sync-status-monitoring.cron.command';
@@ -14,11 +13,7 @@ import { MessagingMonitoringService } from 'src/modules/messaging/monitoring/ser
   imports: [
     AuditModule,
     MessagingCommonModule,
-    TypeOrmModule.forFeature([
-      WorkspaceEntity,
-      DataSourceEntity,
-      MessageChannelEntity,
-    ]),
+    TypeOrmModule.forFeature([WorkspaceEntity, MessageChannelEntity]),
   ],
   providers: [
     MessagingMessageChannelSyncStatusMonitoringCronCommand,

packages/twenty-server/src/modules/workflow/workflow-runner/workflow-run/workflow-run.module.ts

@@ -7,7 +7,6 @@ import { CacheLockModule } from 'src/engine/core-modules/cache-lock/cache-lock.m
 import { MetricsModule } from 'src/engine/core-modules/metrics/metrics.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';
 import { ObjectMetadataEntity } from 'src/engine/metadata-modules/object-metadata/object-metadata.entity';
 import { WorkflowCommonModule } from 'src/modules/workflow/common/workflow-common.module';
 import { DeleteWorkflowRunsCommand } from 'src/modules/workflow/workflow-runner/workflow-run/command/delete-workflow-runs.command';
@@ -23,7 +22,6 @@ import { WorkflowRunWorkspaceService } from 'src/modules/workflow/workflow-runne
     RecordPositionModule,
     CacheLockModule,
     MetricsModule,
-    DataSourceModule,
     WorkspaceIteratorModule,
   ],
   providers: [WorkflowRunWorkspaceService, DeleteWorkflowRunsCommand],