update link with db3 update

app.py

@@ -37,8 +37,9 @@ def trigger_db3():
     for attempt in range(1, 41):          # ≈ 20 min total (30 s × 40)
         try:
             # 1️⃣ check if Db3_update responds
-            r = requests.get(DB3_URL, timeout=15)
-            if r.status_code == 200 and '"status"' in r.text:
+            READY_URL = f"{DB3_URL}/ready"
+            r = requests.get(READY_URL, timeout=15)
+            if r.status_code == 200 and '"ready"' in r.text:
                 log.append(f"✅ Attempt {attempt}: space ready, calling /run")
                 run_url = f"{DB3_URL}/run?secret={SECRET}"
                 run_resp = requests.get(run_url, timeout=120)