Fix ruff per-file-ignores and remove unused variable in test

- pyproject.toml: add D102 to tests/* per-file-ignores so test methods
  are not required to have docstrings (the comment indicated this intent
  but the empty array had no effect)
- test_client.py: remove unused `result` assignment in
  test_password_protect_pdf_with_permissions

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: nickwinder

pyproject.toml

@@ -112,7 +112,7 @@ ignore = [
 convention = "google"
 
 [tool.ruff.lint.per-file-ignores]
-"tests/*" = []  # Don't require docstrings in tests, allow asserts
+"tests/*" = ["D102"]  # Don't require docstrings in tests
 
 [tool.mypy]
 python_version = "3.10"

tests/unit/test_client.py

@@ -737,7 +737,7 @@ async def test_password_protect_pdf_with_permissions(
         owner_password = "owner456"
         permissions = ["printing", "extract_accessibility"]
 
-        result = await unit_client.password_protect(
+        await unit_client.password_protect(
             file, user_password, owner_password, permissions
         )