test: 回退Docker context到26e6cb40完全一致——验证竞赛平台build

Dockerfile/qwen3_6_scripts/ex_engine/computility-run.yaml 全部
还原到26e6cb40的精确内容。删除所有26e6cb40不存在的新增文件
(prebuilt/*.so, wheels/*.whl, vendor_overrides/, 新增.cu/.sh等)。

目的：确认26e6cb40的文件内容在当前git状态下仍能通过竞赛平台build。
如果通过，说明问题在新增文件中；如果不通过，说明问题在git仓库层面。

qwen3_6_scripts/patch_utils.py

@@ -1,81 +0,0 @@
-from __future__ import annotations
-
-import importlib.util
-import pathlib
-import shlex
-from typing import Iterable, Optional, Sequence, Tuple
-
-
-def package_root(pkg: str) -> pathlib.Path:
-    spec = importlib.util.find_spec(pkg)
-    if spec is None:
-        raise RuntimeError(f"package not found: {pkg}")
-    if not spec.submodule_search_locations:
-        raise RuntimeError(f"package has no package root: {pkg}")
-    return pathlib.Path(next(iter(spec.submodule_search_locations))).resolve()
-
-
-def ensure_file(path: pathlib.Path) -> pathlib.Path:
-    if not path.is_file():
-        raise FileNotFoundError(str(path))
-    return path
-
-
-def ensure_dir(path: pathlib.Path) -> pathlib.Path:
-    if not path.is_dir():
-        raise FileNotFoundError(str(path))
-    return path
-
-
-def replace_once(path: pathlib.Path,
-                 old: str,
-                 new: str,
-                 *,
-                 required: bool = True,
-                 already_contains: Optional[str] = None) -> bool:
-    path = ensure_file(path)
-    text = path.read_text()
-    marker = already_contains if already_contains is not None else new
-    if marker in text:
-        print(f"[skip] already patched: {path}")
-        return False
-    if old not in text:
-        msg = f"anchor not found in {path}: {old[:120]!r}"
-        if required:
-            raise RuntimeError(msg)
-        print(f"[warn] {msg}")
-        return False
-    path.write_text(text.replace(old, new, 1))
-    print(f"[ok] patched: {path}")
-    return True
-
-
-def replace_one_of(path: pathlib.Path,
-                   replacements: Sequence[Tuple[str, str]],
-                   *,
-                   required: bool = True,
-                   already_contains: Optional[str] = None) -> bool:
-    path = ensure_file(path)
-    text = path.read_text()
-    if already_contains is not None and already_contains in text:
-        print(f"[skip] already patched: {path}")
-        return False
-    for _, new in replacements:
-        if new in text:
-            print(f"[skip] already patched: {path}")
-            return False
-    for old, new in replacements:
-        if old in text:
-            path.write_text(text.replace(old, new, 1))
-            print(f"[ok] patched: {path}")
-            return True
-    anchors = ", ".join(repr(old[:80]) for old, _ in replacements)
-    msg = f"anchor not found in {path}; tried: {anchors}"
-    if required:
-        raise RuntimeError(msg)
-    print(f"[warn] {msg}")
-    return False
-
-
-def shell_env_line(name: str, value: pathlib.Path) -> str:
-    return f"{name}={shlex.quote(str(value))}"