Update the CLI to use a safe, best-effort console emitter so logging issues cannot fail the run

tests/test_new_launcher.py

@@ -1,3 +1,6 @@
+import importlib.machinery
+import importlib.util
+import io
 import os
 import shutil
 import subprocess
@@ -11,6 +14,15 @@ ROOT = Path(__file__).resolve().parents[1]
 LAUNCHER = ROOT / "audita"
 
 
+def _load_launcher_module():
+    loader = importlib.machinery.SourceFileLoader("audita_launcher", str(LAUNCHER))
+    spec = importlib.util.spec_from_file_location("audita_launcher", LAUNCHER, loader=loader)
+    assert spec is not None and spec.loader is not None
+    module = importlib.util.module_from_spec(spec)
+    spec.loader.exec_module(module)
+    return module
+
+
 def test_root_launcher_exists_and_is_executable():
     assert LAUNCHER.is_file()
     assert os.access(LAUNCHER, os.X_OK)
@@ -73,3 +85,33 @@ def test_root_launcher_preserves_child_exit_code_and_writes_fallback_error_log(t
     assert "audita: subprocess exited with status 120" in result.stderr
     run_dir = next(work_dir.iterdir())
     assert (run_dir / "error.log").exists()
+
+
+class _BrokenWriter:
+    def write(self, _message):
+        raise OSError(9, "Bad file descriptor")
+
+    def flush(self):
+        raise OSError(9, "Bad file descriptor")
+
+
+def test_root_launcher_falls_back_to_stdout_when_stderr_is_invalid(monkeypatch, tmp_path):
+    launcher = _load_launcher_module()
+    work_dir = tmp_path / "work"
+    stdout_capture = io.StringIO()
+
+    monkeypatch.setattr(launcher.shutil, "which", lambda _name: None)
+    monkeypatch.setattr(
+        launcher.sys,
+        "argv",
+        ["audita", "process", "transcript.json", "--glossary", "glossary.yaml", "--work-dir", str(work_dir)],
+    )
+    monkeypatch.setattr(launcher.sys, "stderr", _BrokenWriter())
+    monkeypatch.setattr(launcher.sys, "stdout", stdout_capture)
+
+    exit_code = launcher.main()
+
+    assert exit_code == 1
+    assert "audita: error: uv is required to run this launcher" in stdout_capture.getvalue()
+    run_dir = next(work_dir.iterdir())
+    assert (run_dir / "error.log").exists()