feat: Blurhash integration

Resolve #6559

src/models/entities/drive-file.ts

@@ -67,6 +67,12 @@ export class DriveFile {
 	})
 	public comment: string | null;
 
+	@Column('varchar', {
+		length: 128, nullable: true,
+		comment: 'The BlurHash string.'
+	})
+	public blurhash: string | null;
+
 	@Column('jsonb', {
 		default: {},
 		comment: 'The any properties of the DriveFile. For example, it includes image width/height.'

src/models/entities/user.ts

@@ -106,14 +106,14 @@ export class User {
 	public bannerUrl: string | null;
 
 	@Column('varchar', {
-		length: 32, nullable: true,
+		length: 128, nullable: true,
 	})
-	public avatarColor: string | null;
+	public avatarBlurhash: string | null;
 
 	@Column('varchar', {
-		length: 32, nullable: true,
+		length: 128, nullable: true,
 	})
-	public bannerColor: string | null;
+	public bannerBlurhash: string | null;
 
 	@Column('boolean', {
 		default: false,