- [x] Have you followed the guidelines for contributing? - [x] Have you signed the [CLA](http://www.ubuntu.com/legal/contributors/)? - [x] Have you successfully run `make lint && make test`? --- Addresses review feedback from #54 requesting unit test coverage for the `Lifecycle` service class. ### Changes - Add `tests/unit/services/test_lifecycle.py` with tests covering: - `_get_prime_dirs_from_project()` helper function (partition-to-package name mapping) - `Lifecycle.get_prime_dir()` method (including error handling for non-existent packages) - `Lifecycle.prime_dirs` property ### Test Coverage ```python # Tests verify partition prefix stripping works correctly project_info.prime_dirs = { "package/my-package": Path("/work/partitions/package/my-package/prime"), } result = _get_prime_dirs_from_project(project_info) # Returns: {None: default_prime, "my-package": package_prime} ``` Tests also verify: - Non-package partitions are ignored - Empty partition keys are handled - `DebcraftError` is raised for non-existent package lookups <!-- START COPILOT CODING AGENT TIPS --> --- ✨ Let Copilot coding agent [set things up for you](https://github.com/canonical/debcraft/issues/new?title=✨+Set+up+Copilot+instructions&body=Configure%20instructions%20for%20this%20repository%20as%20documented%20in%20%5BBest%20practices%20for%20Copilot%20coding%20agent%20in%20your%20repository%5D%28https://gh.io/copilot-coding-agent-tips%29%2E%0A%0A%3COnboard%20this%20repo%3E&assignees=copilot) — coding agent works faster and does higher quality work when set up for your repo.