[PD] Fix large page size + chunk prefill (#5588)

scripts/playground/disaggregation/cli.py

@@ -0,0 +1,13 @@
+prompt = "Hello " * 16000
+
+import json
+
+import requests
+
+response = requests.post(
+    "http://0.0.0.0:8000/generate",
+    json={"text": prompt, "sampling_params": {"temperature": 0}},
+)
+
+
+print("Response content (raw):", response.content)