Improve doc

src/server/api/endpoints/drive/files/attached-notes.ts

@@ -30,6 +30,13 @@ export const meta = {
 		}
 	},
 
+	res: {
+		type: 'array',
+		items: {
+			type: 'Note',
+		},
+	},
+
 	errors: {
 		noSuchFile: {
 			message: 'No such file.',

src/server/api/endpoints/drive/files/check-existence.ts

@@ -21,7 +21,11 @@ export const meta = {
 				'ja-JP': 'ファイルのMD5ハッシュ'
 			}
 		}
-	}
+	},
+
+	res: {
+		type: 'DriveFile',
+	},
 };
 
 export default define(meta, async (ps, user) => {