fix(FN-4761): correct review-feedback document persistence

Fusion-Task-Id: FN-4761
Fusion-Task-Lineage: b6b1ed73-c396-4dd2-b97f-366272d05c7f

packages/dashboard/src/__tests__/routes-pr-reviews.test.ts

@@ -36,7 +36,7 @@ function createStore(task: Task): TaskStore {
     updatePrInfo: vi.fn().mockResolvedValue(undefined),
     addComment: vi.fn().mockResolvedValue(task),
     moveTask: vi.fn().mockResolvedValue({ ...task, column: "todo" }),
-    writeTaskDocument: vi.fn().mockResolvedValue({ key: "review-feedback" }),
+    upsertTaskDocument: vi.fn().mockResolvedValue({ key: "review-feedback" }),
     getRootDir: vi.fn().mockReturnValue("/tmp/project"),
     listTasks: vi.fn().mockResolvedValue([]),
     createTask: vi.fn(),

packages/dashboard/src/routes/register-git-github.ts

@@ -1069,7 +1069,11 @@ async function applyChangesRequestedTransition(
       : "",
   ].join("\n").trim();
 
-  await store.writeTaskDocument(task.id, "review-feedback", feedbackBody || "Reviewer requested changes.", "system");
+  await store.upsertTaskDocument(task.id, {
+    key: "review-feedback",
+    content: feedbackBody || "Reviewer requested changes.",
+    author: "system",
+  });
   await store.moveTask(task.id, "todo", {
     preserveProgress: true,
     preserveWorktree: true,
@@ -3358,6 +3362,18 @@ export function registerGitGitHubRoutes(ctx: ApiRoutesContext): void {
         }
       }
 
+      const repoKey = `${owner}/${repo}`;
+      if (!githubRateLimiter.canMakeRequest(repoKey)) {
+        const resetTime = githubRateLimiter.getResetTime(repoKey);
+        const retryAfter = resetTime
+          ? Math.max(0, Math.ceil((resetTime.getTime() - Date.now()) / 1000))
+          : undefined;
+        throw rateLimited("GitHub API rate limit exceeded for this repository", {
+          retryAfter,
+          resetAt: resetTime?.toISOString(),
+        });
+      }
+
       const client = new GitHubClient();
       const snapshot = await client.getPrReviewSnapshot(owner, repo, task.prInfo.number);
       const fusionThread = (task.comments ?? []).filter((comment) =>