news_transformer: clamp ORT threads, disable intra-op spinning; spec marked implemented in ForexBot2

Same two load_model lines as the copy vendored into ForexBot2/news_model.py
(2026-09-27), so the files stay identical on the scoring functions.

news_transformer.py

@@ -25,6 +25,7 @@ from __future__ import annotations
 import argparse
 import html
 import json
+import os
 import sys
 from pathlib import Path
 from typing import Any, Iterable
@@ -68,8 +69,11 @@ def load_model(model_dir: str | Path = DEFAULT_MODEL_DIR,
     tokenizer.enable_padding(pad_id=int(meta["pad_token_id"]), pad_token=meta["pad_token"])
     options = ort.SessionOptions()
     if threads:
-        options.intra_op_num_threads = threads
+        options.intra_op_num_threads = max(1, min(int(threads), os.cpu_count() or 1))
         options.inter_op_num_threads = 1
+    # ORT intra-op threads spin-wait after each run by default; in a mostly
+    # idle bot process that is 4 cores at 100% between cycles.
+    options.add_session_config_entry("session.intra_op.allow_spinning", "0")
     session = ort.InferenceSession(str(model_dir / meta.get("onnx_file", "model.onnx")),
                                    options, providers=["CPUExecutionProvider"])
     return {"meta": meta, "tokenizer": tokenizer, "session": session}