NPE in MetadataStorage

```
java.lang.NullPointerException
at space.taran.arklib.domain.meta.MetadataStorage.valueFromBinary(MetadataStorage.kt:37)
at space.taran.arklib.domain.storage.FolderStorage$readFromDisk$jobs$2$1.invokeSuspend(FolderStorage.kt:94)
at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:33)
at kotlinx.coroutines.DispatchedTask.run(DispatchedTask.kt:106)
at kotlinx.coroutines.internal.LimitedDispatcher.run(LimitedDispatcher.kt:42)
at kotlinx.coroutines.scheduling.TaskImpl.run(Tasks.kt:95)
at kotlinx.coroutines.scheduling.CoroutineScheduler.runSafely(CoroutineScheduler.kt:570)
at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.executeTask(CoroutineScheduler.kt:750)
at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.runWorker(CoroutineScheduler.kt:677)
at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.run(CoroutineScheduler.kt:664)
```

Start by inspecting MetadataStorage.valueFromBinary at MetadataStorage.kt:37 and the readFromDisk path in FolderStorage.kt:94, using the provided stack trace as the entry point. Reproduce the failure if possible, identify the null value, and verify that reading the affected metadata no longer raises an NPE.

Written by the indexing model from the issue text.