[PD] Fix edge case and simplify large page size + chunked prefill (#5589)

scripts/playground/disaggregation/cli.py

@@ -1,4 +1,4 @@
-prompt = "Hello " * 16000
+prompt = [0] * 431
 
 import json
 
@@ -6,8 +6,8 @@ import requests
 
 response = requests.post(
     "http://0.0.0.0:8000/generate",
-    json={"text": prompt, "sampling_params": {"temperature": 0}},
+    json={"input_ids": [prompt] * 32, "sampling_params": {"temperature": 0}},
 )
 
 
-print("Response content (raw):", response.content)
+# print("Response content (raw):", response.content)