python-sdk: show persisted turn items in example 02 (2026-03-13)

Update the sync and async turn-run examples to read the thread after a completed turn and print the persisted item count instead of the empty immediate TurnResult.items list.

This makes the example output match the current app-server behavior, where the completed turn payload can have empty items even though the persisted thread turn later contains the generated items.

Validation:
- python3 sdk/python/examples/02_turn_run/sync.py
- python3 sdk/python/examples/02_turn_run/async.py

Co-authored-by: Codex <noreply@openai.com>

sdk/python/examples/02_turn_run/sync.py

@@ -14,6 +14,11 @@ from codex_app_server import Codex, TextInput
 with Codex(config=runtime_config()) as codex:
     thread = codex.thread_start(model="gpt-5.4", config={"model_reasoning_effort": "high"})
     result = thread.turn(TextInput("Give 3 bullets about SIMD.")).run()
+    persisted = thread.read(include_turns=True)
+    persisted_turn = next(
+        (turn for turn in persisted.thread.turns or [] if turn.id == result.turn_id),
+        None,
+    )
 
     print("thread_id:", result.thread_id)
     print("turn_id:", result.turn_id)
@@ -21,7 +26,10 @@ with Codex(config=runtime_config()) as codex:
     if result.error is not None:
         print("error:", result.error)
     print("text:", result.text)
-    print("items.count:", len(result.items))
+    print(
+        "persisted.items.count:",
+        0 if persisted_turn is None else len(persisted_turn.items or []),
+    )
     if result.usage is None:
         raise RuntimeError("missing usage for completed turn")
     print("usage.thread_id:", result.usage.thread_id)