fix(vault): исправил шифрование, meta Yandex и enc-meta при первом открытии

Remember key после encrypt, мягкий auto-open в UnlockManager,
StorageMetaLoadState без затирания meta на сетевых ошибках,
фильтр storages в YandexVault и создание .enc-meta при FileNotFound.

domain/src/main/java/com/github/nullptroma/wallenc/domain/datatypes/StorageMetaLoadState.kt

@@ -0,0 +1,7 @@
+package com.github.nullptroma.wallenc.domain.datatypes
+
+enum class StorageMetaLoadState {
+    Loading,
+    Ready,
+    Unavailable,
+}

domain/src/main/java/com/github/nullptroma/wallenc/domain/interfaces/IStorage.kt

@@ -1,6 +1,7 @@
 package com.github.nullptroma.wallenc.domain.interfaces
 
 import com.github.nullptroma.wallenc.domain.datatypes.StorageEncryptionInfo
+import com.github.nullptroma.wallenc.domain.datatypes.StorageMetaLoadState
 import com.github.nullptroma.wallenc.domain.tasks.TaskProgress
 import kotlinx.coroutines.flow.Flow
 import kotlinx.coroutines.flow.StateFlow
@@ -14,6 +15,7 @@ sealed interface IStorageInfo {
     val numberOfFiles: StateFlow<Int?>
     val isEmpty: Flow<Boolean?>
     val metaInfo: StateFlow<IStorageMetaInfo>
+    val metaLoadState: StateFlow<StorageMetaLoadState>
     val isVirtualStorage: Boolean
 }
 

domain/src/main/java/com/github/nullptroma/wallenc/domain/interfaces/IUnlockManager.kt

@@ -16,6 +16,8 @@ interface IUnlockManager {
     fun getOpenedStorageKey(uuid: UUID): EncryptKey?
 
     suspend fun open(storage: IStorage, key: EncryptKey, rememberPassword: Boolean = true): IStorage
+    /** Сохранить ключ для auto-open без открытия виртуального storage. */
+    suspend fun rememberKey(storage: IStorage, key: EncryptKey)
     suspend fun close(storage: IStorage)
     suspend fun close(uuid: UUID)
 }