refactor(errors): унифицировал доменные ошибки и добавил failed-статус задач

app/src/main/java/com/github/nullptroma/wallenc/app/auth/YandexSignInService.kt

@@ -6,6 +6,7 @@ import androidx.activity.result.ActivityResultLauncher
 import com.github.nullptroma.wallenc.domain.vault.vaults.yandex.YandexRegistration
 import com.github.nullptroma.wallenc.vault.contract.CloudBrand
 import com.github.nullptroma.wallenc.vault.contract.RemoteVaultAuthenticator
+import com.github.nullptroma.wallenc.vault.contract.VaultLinkFailure
 import com.github.nullptroma.wallenc.vault.contract.VaultLinkOutcome
 import com.yandex.authsdk.YandexAuthLoginOptions
 import com.yandex.authsdk.YandexAuthOptions
@@ -70,16 +71,12 @@ class YandexSignInService @Inject constructor(
 
     override fun beginLink(brand: CloudBrand, onResult: (VaultLinkOutcome) -> Unit) {
         if (brand != CloudBrand.YANDEX) {
-            onResult(VaultLinkOutcome.Failed("Brand $brand is not supported by YandexSignInService"))
+            onResult(VaultLinkOutcome.Failed(VaultLinkFailure.UnsupportedBrand))
             return
         }
         val l = launcher
         if (l == null) {
-            onResult(
-                VaultLinkOutcome.Failed(
-                    "YandexSignInService: call registerWith(activity) from MainActivity.onCreate first",
-                ),
-            )
+            onResult(VaultLinkOutcome.Failed(VaultLinkFailure.NotRegistered))
             return
         }
         synchronized(this) { pending = onResult }
@@ -90,9 +87,7 @@ class YandexSignInService @Inject constructor(
         is YandexAuthResult.Success ->
             VaultLinkOutcome.Success(YandexRegistration(result.token.value))
         is YandexAuthResult.Failure ->
-            VaultLinkOutcome.Failed(
-                result.exception.message ?: result.exception.toString(),
-            )
+            VaultLinkOutcome.Failed(VaultLinkFailure.AuthError)
         YandexAuthResult.Cancelled -> VaultLinkOutcome.Cancelled
     }
 }