Add retry with backoff for submit endpoint (handles 429 rate limit)

app.py

@@ -772,36 +772,57 @@ def run_and_submit_all(profile: gr.OAuthProfile | None):
             pd.DataFrame(results_log),
         )
 
-    # 4 — Submit
-    yield f"📤 Submitting {len(answers_payload)} answers for **{username}**…", pd.DataFrame(results_log)
-
+    # 4 — Submit (with retry for 429 rate limits)
     submission = {
         "username": username,
         "agent_code": agent_code,
         "answers": answers_payload,
     }
-    try:
-        resp = requests.post(SUBMIT_URL, json=submission, timeout=120)
-        resp.raise_for_status()
-        data = resp.json()
-        score = data.get("score", "N/A")
-        correct = data.get("correct_count", "?")
-        total_att = data.get("total_attempted", "?")
-        msg = data.get("message", "")
-        final_status = (
-            f"🎉 **Submission Successful!**\n\n"
-            f"👤 User: {data.get('username', username)}\n"
-            f"📊 Score: **{score}%** ({correct}/{total_att} correct)\n"
-            f"💬 {msg}"
+
+    final_status = "❌ Submission failed: unknown error"
+    for submit_attempt in range(1, 6):
+        yield (
+            f"📤 Submitting {len(answers_payload)} answers for **{username}**…"
+            + (f" (attempt {submit_attempt}/5)" if submit_attempt > 1 else ""),
+            pd.DataFrame(results_log),
         )
-    except requests.HTTPError as exc:
         try:
-            detail = exc.response.json().get("detail", exc.response.text[:400])
-        except Exception:
-            detail = exc.response.text[:400]
-        final_status = f"❌ Submission failed (HTTP {exc.response.status_code}):\n{detail}"
-    except Exception as exc:
-        final_status = f"❌ Submission error: {exc}"
+            resp = requests.post(SUBMIT_URL, json=submission, timeout=120)
+            if resp.status_code == 429:
+                wait_sec = 30 * submit_attempt
+                if submit_attempt < 5:
+                    yield f"⏳ Submit server busy (429). Waiting {wait_sec}s before retry {submit_attempt+1}/5…", pd.DataFrame(results_log)
+                    time.sleep(wait_sec)
+                    continue
+                else:
+                    final_status = "❌ Submit server rate-limited after 5 attempts. Please try again in a few minutes."
+                    break
+            resp.raise_for_status()
+            data = resp.json()
+            score = data.get("score", "N/A")
+            correct = data.get("correct_count", "?")
+            total_att = data.get("total_attempted", "?")
+            msg = data.get("message", "")
+            final_status = (
+                f"🎉 **Submission Successful!**\n\n"
+                f"👤 User: {data.get('username', username)}\n"
+                f"📊 Score: **{score}%** ({correct}/{total_att} correct)\n"
+                f"💬 {msg}"
+            )
+            break
+        except requests.HTTPError as exc:
+            try:
+                detail = exc.response.json().get("detail", exc.response.text[:400])
+            except Exception:
+                detail = exc.response.text[:400]
+            final_status = f"❌ Submission failed (HTTP {exc.response.status_code}):\n{detail}"
+            if submit_attempt < 5:
+                time.sleep(15 * submit_attempt)
+                continue
+            break
+        except Exception as exc:
+            final_status = f"❌ Submission error: {exc}"
+            break
 
     yield final_status, pd.DataFrame(results_log)