fix: wait for QuickStack deployment visibility

.gitea/actions/quickstack-oci/deploy.test.mjs

@@ -147,3 +147,35 @@ test("transient QuickStack deployment failures retry the desired immutable image
   assert.equal(current.sourceType, "CONTAINER");
   assert.equal(current.containerImageSource, image);
 });
+
+test("a newly created deployment may be briefly unavailable without triggering rollback", async () => {
+  let current = app();
+  let deployments = 0;
+  let lookups = 0;
+  const image = `gitea.example/owner/app@sha256:${"c".repeat(64)}`;
+  const client = {
+    getApp: async () => current,
+    saveApp: async (payload) => { current = { ...current, ...payload }; },
+    deployApp: async () => ({ deploymentId: `deployment-${++deployments}` }),
+    getDeployment: async (_appId, deploymentId) => {
+      lookups += 1;
+      if (lookups === 1) throw Object.assign(new Error("not visible"), { statusCode: 404 });
+      return { deploymentId, status: "DEPLOYED" };
+    },
+  };
+
+  const result = await deployExactImage({
+    client,
+    appId: "app-one",
+    image,
+    registryUsername: "deploy",
+    registryToken: "token",
+    sha: "3".repeat(40),
+    sleep: async () => {},
+  });
+
+  assert.equal(deployments, 1);
+  assert.equal(lookups, 2);
+  assert.equal(result.image, image);
+  assert.equal(current.sourceType, "CONTAINER");
+});