fix: harden Docker image and async job responses

Harden Docker runtime packaging, preserve async job response semantics, fix Redis subscriber startup connections, clear lint warnings, and harden enterprise S3 object body handling.

tests/unit/api/jobs/connection.test.ts

@@ -0,0 +1,41 @@
+import { beforeEach, describe, expect, it, vi } from "vitest";
+
+const { RedisMock } = vi.hoisted(() => ({
+  RedisMock: vi.fn(function RedisMock() {
+    return {};
+  }),
+}));
+
+vi.mock("ioredis", () => ({
+  default: RedisMock,
+}));
+
+describe("Redis connection factory", () => {
+  beforeEach(() => {
+    RedisMock.mockClear();
+  });
+
+  it("keeps ready checks enabled for command connections", async () => {
+    const { createRedisConnection } = await import("../../../../apps/api/src/jobs/connection.js");
+
+    createRedisConnection();
+
+    expect(RedisMock).toHaveBeenCalledWith(expect.any(String), {
+      enableReadyCheck: true,
+      maxRetriesPerRequest: null,
+    });
+  });
+
+  it("disables ready checks for pub/sub-only subscriber connections", async () => {
+    const { createRedisSubscriberConnection } = await import(
+      "../../../../apps/api/src/jobs/connection.js"
+    );
+
+    createRedisSubscriberConnection();
+
+    expect(RedisMock).toHaveBeenCalledWith(expect.any(String), {
+      enableReadyCheck: false,
+      maxRetriesPerRequest: null,
+    });
+  });
+});