Remove Uptime Kuma integration

- Delete kuma_client.py and all Kuma-related code
- Remove /infrastructure/monitors endpoints
- Update service start/stop to use Portainer only
- Simplify service control widget to show container status
- Remove Kuma config and credentials
- Delete stale memory tests (moved to core-ai service)
- Add test infrastructure with pytest
- Add tests for service_groups, config, and health endpoints
- Bump version to 1.1.0

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

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

pyproject.toml

@@ -1,6 +1,6 @@
 [project]
 name = "core-api"
-version = "1.0.0"
+version = "1.1.0"
 description = "Core Code API - Infrastructure management and tools API"
 readme = "README.md"
 requires-python = ">=3.12"
@@ -8,3 +8,9 @@ license = {text = "MIT"}
 
 [tool.setuptools]
 packages = ["src"]
+
+[tool.pytest.ini_options]
+testpaths = ["tests"]
+pythonpath = ["."]
+asyncio_mode = "auto"
+addopts = "-v"