Refactor tenant ORM integration (#1650)

* Refactor tenant ORM integration

* fix tests

server/src/tenant/metadata/object-metadata/object-metadata.entity.ts

@@ -0,0 +1,37 @@
+import {
+  Column,
+  CreateDateColumn,
+  Entity,
+  OneToMany,
+  PrimaryGeneratedColumn,
+  UpdateDateColumn,
+} from 'typeorm';
+
+import { FieldMetadata } from 'src/tenant/metadata/field-metadata/field-metadata.entity';
+
+@Entity('object_metadata')
+export class ObjectMetadata {
+  @PrimaryGeneratedColumn('uuid')
+  id: string;
+
+  @Column({ nullable: false, name: 'data_source_id' })
+  dataSourceId: string;
+
+  @Column({ nullable: false })
+  name: string;
+
+  @Column({ default: false, name: 'is_custom' })
+  isCustom: boolean;
+
+  @Column({ nullable: false, name: 'workspace_id' })
+  workspaceId: string;
+
+  @OneToMany(() => FieldMetadata, (field) => field.object)
+  fields: FieldMetadata[];
+
+  @CreateDateColumn({ name: 'created_at' })
+  createdAt: Date;
+
+  @UpdateDateColumn({ name: 'updated_at' })
+  updatedAt: Date;
+}