Fix memory leak caused by missing TTL in cache (#2044)

src/Signal/libsignal.ts

@@ -30,7 +30,7 @@ export function makeLibSignalRepository(
 
 	const parsedKeys = auth.keys as SignalKeyStoreWithTransaction
 	const migratedSessionCache = new LRUCache<string, true>({
-		ttl: 7 * 24 * 60 * 60 * 1000, // 7 days
+		ttl: 3 * 24 * 60 * 60 * 1000, // 7 days
 		ttlAutopurge: true,
 		updateAgeOnGet: true
 	})

src/Signal/lid-mapping.ts

@@ -5,7 +5,7 @@ import { isHostedPnUser, isLidUser, isPnUser, jidDecode, jidNormalizedUser, WAJI
 
 export class LIDMappingStore {
 	private readonly mappingCache = new LRUCache<string, string>({
-		ttl: 7 * 24 * 60 * 60 * 1000, // 7 days
+		ttl: 3 * 24 * 60 * 60 * 1000, // 7 days
 		ttlAutopurge: true,
 		updateAgeOnGet: true
 	})