Convert metadata tables to camel_case (#2420)

* Convert metadata tables to camelcase

* refactor folder structure

* rename datasourcemetadata

* regenerate metadata schema

* rename dataSourceMetadata to dataSource

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

@@ -0,0 +1,40 @@
+import {
+  Column,
+  CreateDateColumn,
+  Entity,
+  PrimaryGeneratedColumn,
+  UpdateDateColumn,
+  DataSourceOptions,
+} from 'typeorm';
+
+type DataSourceType = DataSourceOptions['type'];
+
+@Entity('dataSource')
+export class DataSourceEntity {
+  @PrimaryGeneratedColumn('uuid')
+  id: string;
+
+  @Column({ nullable: true })
+  url: string;
+
+  @Column({ nullable: true })
+  schema: string;
+
+  @Column({ type: 'enum', enum: ['postgres'], default: 'postgres' })
+  type: DataSourceType;
+
+  @Column({ nullable: true, name: 'label' })
+  label: string;
+
+  @Column({ default: false })
+  isRemote: boolean;
+
+  @Column({ nullable: false })
+  workspaceId: string;
+
+  @CreateDateColumn()
+  createdAt: Date;
+
+  @UpdateDateColumn()
+  updatedAt: Date;
+}