Add is system flag to object metadata (#2481)

* Add isSystem flag to objectMetadata

* squash migrations and add dataSource->objects FK

* fix missing datasource enum type

server/src/metadata/data-source/data-source.entity.ts

@@ -5,8 +5,11 @@ import {
   PrimaryGeneratedColumn,
   UpdateDateColumn,
   DataSourceOptions,
+  OneToMany,
 } from 'typeorm';
 
+import { ObjectMetadataEntity } from 'src/metadata/object-metadata/object-metadata.entity';
+
 type DataSourceType = DataSourceOptions['type'];
 
 @Entity('dataSource')
@@ -29,6 +32,11 @@ export class DataSourceEntity {
   @Column({ default: false })
   isRemote: boolean;
 
+  @OneToMany(() => ObjectMetadataEntity, (object) => object.dataSource, {
+    cascade: true,
+  })
+  objects: ObjectMetadataEntity[];
+
   @Column({ nullable: false })
   workspaceId: string;