fix(chv-muse-r12fix-2): P6 worker 接进镜像（build.sh + BUILDINFO + lockfile）

R12 真机：chv-gitea-worker / chv-sync-worker-client /
privsep.py / safety.py / chv-gitea-worker.service 5 文件全不在
镜像内，build.sh 从未有 P6 拷入行，全链路无法跑。按 gap 文档
§2 接入说明落地：worker 三件硬校验 + 拷入 /usr/local/bin/
与 /etc/systemd/system/（mv 去后缀 + chmod +x + systemctl
enable）；privsep/safety 叶子模块条件拷入
/usr/local/lib/chv-gitea/（与 P3 同款口径，缺失只警告）；
叶子树 __init__ 用 stub（绝不拷真实 cloud/chv/__init__.py，
round-11 层 1 教训），stub 需 errors.py 故一并拷入；runcmd
在 chv-sync boot 前加 systemctl start chv-gitea-worker。
BUILDINFO contents 列入 worker 三件（无条件）与 privsep/
safety（条件，extra_contents）；两处 lockfile 登记补齐 P6
五项，另补 P4 三件自 P4 起缺失的登记。

cloud/tests/test_chv_muse_p6.py

@@ -756,5 +756,39 @@ class ExecutorAuditHookTest(unittest.TestCase):
             safety_mod.DEFAULT_AUDIT_LOGGER = old
 
 
+class BuildInfoContentsTest(unittest.TestCase):
+    """round-12 修复轮（项 2，P6）：worker 三件须进 BUILDINFO
+    contents（无条件拷入，与 P2/P4 同款钉法）。"""
+
+    def test_contents_include_p6_items(self):
+        root = Path(__file__).resolve().parents[2]
+        path = root / "chv-guest" / "buildinfo.py"
+        spec = importlib.util.spec_from_file_location(
+            "chv_guest_p6_buildinfo", str(path))
+        module = importlib.util.module_from_spec(spec)
+        spec.loader.exec_module(module)
+        with tempfile.TemporaryDirectory() as tmp:
+            out = os.path.join(tmp, "out")
+            os.makedirs(out)
+            for name, content in (("disk.raw", b"D"),
+                                  ("vmlinux", b"K")):
+                with open(os.path.join(out, name), "wb") as fh:
+                    fh.write(content)
+            for name, lines in (
+                    ("guest-versions-dpkg.txt", ["git 9.9.9-9ubuntu9"]),
+                    ("guest-versions-pip.txt", ["playwright==9.9.9"]),
+                    ("guest-versions-gt.txt", ["gt version 1.0.0"]),
+                    ("guest-versions-chromium.txt",
+                     ["chromium_headless_shell-1248"])):
+                with open(os.path.join(out, name), "w") as fh:
+                    fh.write("\n".join(lines) + "\n")
+            info = module.build(
+                out, "chv-guest-24.04-0.164.0-alpha.9-abc1234", "24.04",
+                "0.164.0-alpha.9", "abc1234", "0" * 64, True, "1248")
+            for item in ("chv-gitea-worker", "chv-sync-worker-client",
+                         "chv-gitea-worker.service"):
+                self.assertIn(item, info["contents"])
+
+
 if __name__ == "__main__":
     unittest.main()