server: only decrement deletion ref count on final fail

Changelog: Fixed

packages/backend/src/queue/index.ts

@@ -59,7 +59,11 @@ deliverQueue
 	})
 	.on('failed', async (job, err) => {
 		deliverLogger.warn(`failed(${err}) ${getJobInfo(job)} to=${job.data.to}`);
-		await deletionRefCount(job);
+
+		if (job.attemptsMade >= (job.opts?.attempts ?? 1)) {
+			// this was the last attempt
+			await deletionRefCount(job);
+		}
 	})
 	.on('error', (job: any, err: Error) => deliverLogger.error(`error ${err}`))
 	.on('stalled', (job) => deliverLogger.warn(`stalled ${getJobInfo(job)} to=${job.data.to}`));