chore: synchronize code and database schema (#8577)

* chore: remove default null

null is always the default value if a table column is nullable, and typeorm's
@Column only accepts strings for default.

* chore: synchronize code with database schema

* chore: sync generated migrations with code

packages/backend/src/models/entities/drive-file.ts

@@ -79,7 +79,6 @@ export class DriveFile {
 	})
 	public properties: { width?: number; height?: number; orientation?: number; avgColor?: string };
 
-	@Index()
 	@Column('boolean')
 	public storedInternal: boolean;