feat: チャンネルの削除

Resolve #7171
Resolve #9935

packages/backend/src/models/entities/Channel.ts

@@ -70,6 +70,12 @@ export class Channel {
 	})
 	public color: string;
 
+	@Index()
+	@Column('boolean', {
+		default: false,
+	})
+	public isArchived: boolean;
+
 	@Index()
 	@Column('integer', {
 		default: 0,

packages/backend/src/models/json-schema/channel.ts

@@ -30,6 +30,10 @@ export const packedChannelSchema = {
 			format: 'url',
 			nullable: true, optional: false,
 		},
+		isArchived: {
+			type: 'boolean',
+			optional: false, nullable: false,
+		},
 		notesCount: {
 			type: 'number',
 			nullable: false, optional: false,