chore: add retry interfaces

Api/Data/ResultInterface.php

@@ -0,0 +1,22 @@
+<?php
+
+namespace MageOS\AsyncEvents\Api\Data;
+
+interface ResultInterface
+{
+    public function getIsSuccessful(): bool;
+
+    public function setIsSuccessful(bool $isSuccessful): void;
+
+    public function getIsRetryable(): bool;
+
+    public function setIsRetryable(bool $isRetryable): void;
+
+    public function getRetryAfter(): int;
+
+    public function setRetryAfter(int $retryAfter): void;
+
+    public function isSuccessful(): bool;
+
+    public function isRetryable(): bool;
+}

Api/RetryManagementInterface.php

@@ -0,0 +1,12 @@
+<?php
+
+namespace MageOS\AsyncEvents\Api;
+
+interface RetryManagementInterface
+{
+    public function init(int $subscriptionId, mixed $data, string $uuid): void;
+
+    public function place(int $deathCount, int $subscriptionId, mixed $data, string $uuid, int $backoff = 0): void;
+
+    public function kill(int $subscriptionId, mixed $data): void;
+}