style: apply black formatting to server.py

- Fixed code formatting in server.py using black
- Only formatting changes, no functional modifications
- Ensures consistent code style across the project

All tests pass (96/96) and linting is clean:
- ✅ pytest: 96 tests passed
- ✅ ruff: all checks passed
- ✅ black: formatting applied
- ✅ isort: import sorting correct

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

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

server.py

@@ -227,9 +227,7 @@ async def main():
             InitializationOptions(
                 server_name="gemini",
                 server_version=__version__,
-                capabilities=ServerCapabilities(
+                capabilities=ServerCapabilities(tools=ToolsCapability()),  # Advertise tool support capability
-                    tools=ToolsCapability()  # Advertise tool support capability
-                ),
             ),
         )