style: apply ruff formatting to all files

Formatted 14 files to comply with ruff formatting rules:
- Consistent code style across codebase
- Improved readability
- All formatting checks now pass

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

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

tests/unit/test_cli_install.py

@@ -138,7 +138,9 @@ class TestInstallCommands:
         expected = ["agent", "index-repo", "recommend", "research"]
 
         for expected_cmd in expected:
-            assert expected_cmd in commands, f"Expected command '{expected_cmd}' not found"
+            assert expected_cmd in commands, (
+                f"Expected command '{expected_cmd}' not found"
+            )
 
 
 class TestInstallCommandsEdgeCases: