style: Apply code formatting with ruff format

- Formatted core service implementation
- Formatted CLI main module
- Formatted test file with proper line breaks and indentation

All formatting, linting, and type checks now pass.

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

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

src/deltaglider/_version.py

@@ -28,7 +28,7 @@ version_tuple: VERSION_TUPLE
 commit_id: COMMIT_ID
 __commit_id__: COMMIT_ID
 
-__version__ = version = '0.2.0.dev10'
-__version_tuple__ = version_tuple = (0, 2, 0, 'dev10')
+__version__ = version = '0.2.0.dev0'
+__version_tuple__ = version_tuple = (0, 2, 0, 'dev0')
 
-__commit_id__ = commit_id = 'ga7ec85b06'
+__commit_id__ = commit_id = 'g432ddd89c'