a little updates

features/common/common/src/commonMain/kotlin/dev/inmo/postssystem/features/common/common/SimpleInputProvider.kt

@@ -33,9 +33,10 @@ expect class FileBasedInputProvider : SimpleInputProvider {
 }
 
 @Serializable(SimpleInputProviderSerializer::class)
-class CustomInputProvider(private val provider: () -> Input) : SimpleInputProvider {
-    override val contentBytes: Long?
-        get() = null
+class CustomInputProvider(
+    override val contentBytes: Long? = null,
+    private val provider: () -> Input
+) : SimpleInputProvider {
     override fun invoke(): Input = provider()
 }