Fix CI: add pytest-cov dependency and format test file

- Added pytest-cov to dev dependencies (CI uses --cov flag)
- Removed ruff upper bound (<1.0.0) — ruff 0.15.1 is current
- Reformatted test_error_sanitization.py to pass black check

Co-Authored-By: Claude Opus 4.6 <[email protected]>

Author: For-Sunny

pyproject.toml

@@ -30,8 +30,9 @@ dependencies = [
 dev = [
     "pytest>=7.4.0,<9.0.0",
     "pytest-asyncio>=0.21.0,<1.0.0",
+    "pytest-cov>=4.0.0",
     "black>=23.0.0,<25.0.0",
-    "ruff>=0.1.0,<1.0.0",
+    "ruff>=0.1.0",
 ]
 
 [project.urls]

tests/test_error_sanitization.py

@@ -79,9 +79,7 @@ def test_handles_empty_error(self):
 
     def test_sanitizes_multiple_paths(self):
         """Test that multiple paths in one error are all sanitized."""
-        error = Exception(
-            r"Error copying C:\Users\admin\source.txt to C:\Users\admin\dest.txt"
-        )
+        error = Exception(r"Error copying C:\Users\admin\source.txt to C:\Users\admin\dest.txt")
         result = sanitize_error_message(error)
         assert r"C:\Users\admin" not in result
         # The filenames should still be referenced