fix: resolve ruff format check failure in test file

Why this change is needed:
The CI lint-and-format check is failing due to a line length violation
in test_workspace_lock_bugfixes.py line 73. The assert statement exceeds
the maximum line length enforced by ruff formatter.

How it solves it:
Split the long assert statement into multiple lines following Python's
continuation syntax, making it compliant with ruff's line length rules.

Impact:
- CI lint-and-format check will now pass
- Code readability is improved with proper line breaks
- No functional changes to test logic

Testing:
Verified with: uv run pre-commit run --files tests/test_workspace_lock_bugfixes.py
Result: All checks passed (ruff-format, ruff linting)

tests/test_workspace_lock_bugfixes.py

@@ -70,7 +70,10 @@ def test_workspace_async_locks_per_process():
     assert lock1._async_lock is lock2._async_lock
 
     # Verify it's the same as the one stored in _workspace_async_locks
-    assert lock1._async_lock is shared_storage._workspace_async_locks["tenant1:storage_lock"]
+    assert (
+        lock1._async_lock
+        is shared_storage._workspace_async_locks["tenant1:storage_lock"]
+    )
 
 
 def test_multiple_workspace_locks_different_async_locks():