server: don't cache users for infinity

If the cache runs for an infinite amount of time, the users may as well
be stored in memory directly.

Changelog: Fixed

packages/backend/src/misc/keypair-store.ts

@@ -2,9 +2,10 @@ import { UserKeypairs } from '@/models/index.js';
 import { User } from '@/models/entities/user.js';
 import { UserKeypair } from '@/models/entities/user-keypair.js';
 import { Cache } from './cache.js';
+import { MINUTE } from '@/const.js';
 
 const cache = new Cache<UserKeypair>(
-	Infinity,
+	15 * MINUTE,
 	(userId) => UserKeypairs.findOneByOrFail({ userId }),
 );
 

packages/backend/src/services/user-cache.ts

@@ -3,17 +3,18 @@ import { ILocalUser, User } from '@/models/entities/user.js';
 import { Users } from '@/models/index.js';
 import { Cache } from '@/misc/cache.js';
 import { subscriber } from '@/db/redis.js';
+import { MINUTE } from '@/const.js';
 
 export const userByIdCache = new Cache<User>(
-	Infinity,
+	15 * MINUTE,
 	async (id) => await Users.findOneBy({ id, isDeleted: IsNull() }) ?? undefined,
 );
 export const localUserByNativeTokenCache = new Cache<ILocalUser>(
-	Infinity,
+	15 * MINUTE,
 	async (token) => await Users.findOneBy({ token, host: IsNull(), isDeleted: IsNull() }) as ILocalUser | null ?? undefined,
 );
 export const uriPersonCache = new Cache<User>(
-	Infinity,
+	15 * MINUTE,
 	async (uri) => await Users.findOneBy({ uri, isDeleted: IsNull() }) ?? undefined,
 );