fix: Add missing _get_current_branch mock in temporal indexer test

The test was failing because it mocked _get_commit_history but not
_get_current_branch, which is also called during index_commits() and
runs git subprocess on the mock directory.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: jsbattig

tests/unit/services/temporal/test_temporal_indexer_uses_parallel.py

@@ -74,12 +74,16 @@ def test_index_commits_calls_parallel_processing(self):
             # Returns: (commits_processed, files_processed, vectors_created)
             indexer._process_commits_parallel = Mock(return_value=(10, 15, 20))
 
-            # Mock commit history
-            with patch.object(indexer, "_get_commit_history") as mock_history:
+            # Mock commit history and _get_current_branch (to avoid git subprocess calls)
+            with (
+                patch.object(indexer, "_get_commit_history") as mock_history,
+                patch.object(indexer, "_get_current_branch") as mock_branch,
+            ):
                 mock_history.return_value = [
                     Mock(hash="commit1", timestamp=1000, message="Test commit 1"),
                     Mock(hash="commit2", timestamp=2000, message="Test commit 2"),
                 ]
+                mock_branch.return_value = "main"
 
                 # Call index_commits
                 indexer.index_commits(all_branches=False)