chore(release): bump version to 1.3.18

Bump the package version to 1.3.18, upgrade dependencies,
consolidate module exports, add a unit test suite, and document
all changes.

- Bump package version to 1.3.18 in pyproject.toml
- Upgrade pydantic-settings to 2.14.2 and pyright to 1.1.411
- Consolidate package exports in mdrsclient/__init__.py
- Add a comprehensive unit test suite in tests/test_commands.py
- Document testing execution and add full history in CHANGELOG.md

CHANGELOG.md

@@ -0,0 +1,129 @@
+# Changelog
+
+All notable changes to this project will be documented in this file.
+
+## [1.3.18] - 2026-07-02
+
+### Added
+- Added a comprehensive unit test suite in `tests/test_commands.py` checking registration, parsing, and execution flow of all 16 commands.
+
+### Refactored
+- Abstracted configuration storage (introducing `ConfigInterface`, `InMemoryConfig`, and updating `ConfigFile`) to enable dependency injection.
+- Modularized transfer operations (upload and download) to decouple them from the service layer.
+- Decoupled commands from direct file system configurations and migrated all subcommands to use abstract config classes.
+
+### Changed
+- Upgraded dependencies including `pydantic-settings` to `2.14.2` and `pyright` to `1.1.411`.
+
+### Fixed
+- Fixed duplicate `__all__` definitions in package initialization file `mdrsclient/__init__.py` that caused `__version__` export to be overwritten.
+
+## [1.3.17] - 2026-07-02
+
+### Refactored
+- Decoupled core logic from CLI interface and introduced `MdrsClient` service layer to improve library portability.
+- Migrated all CLI commands to utilize `MdrsClient` for execution.
+
+### Added
+- Abstract authentication state using `CacheInterface` and `InMemoryCache`.
+
+## [1.3.16] - 2026-06-12
+
+### Fixed
+- Retrieve the full `Folder` object from `FoldersApi` instead of using the `FolderSimple` returned by `find_sub_folder` when resolving DOI subfolders. This fixes a type checker error under the upgraded pyright and avoids a potential AttributeError at runtime due to `FolderSimple` lacking the `path` attribute.
+
+### Changed
+- Upgraded dependencies and bumped version to 1.3.16 in pyproject.toml.
+
+## [1.3.15] - 2026-05-01
+
+### Changed
+- Bumped package version to 1.3.15.
+
+## [1.3.14] - 2026-04-17
+
+### Changed
+- Simplified `config list` command (removed `-l`/`--long` option, always display URL).
+
+### Added
+- Added subcommand aliases for config commands (e.g. `ls` alias for list, `rm` alias for delete).
+
+## [1.3.13] - 2025-07-02
+
+### Changed
+- Bumped package version to 1.3.13.
+
+## [1.3.12] - 2025-05-20
+
+### Changed
+- Bumped package version to 1.3.12.
+
+## [1.3.11] - 2025-01-21
+
+### Changed
+- Bumped package version to 1.3.11.
+
+## [1.3.10] - 2024-12-23
+
+### Changed
+- Bumped package version to 1.3.10.
+
+## [1.3.9] - 2024-10-23
+
+### Fixed
+- Fixed compatibility with Python 3.10.
+
+## [1.3.8] - 2024-09-18
+
+### Changed
+- Bumped package version to 1.3.8.
+
+## [1.3.7] - 2024-07-22
+
+### Added
+- Implemented `--exclude` argument for download subcommand.
+
+## [1.3.6] - 2024-07-08
+
+### Changed
+- Bumped package version to 1.3.6.
+
+## [1.3.5] - 2024-07-08
+
+### Changed
+- Bumped package version to 1.3.5.
+
+## [1.3.4] - 2024-07-04
+
+### Added
+- Added some aliases for config sub command.
+
+## [1.3.3] - 2024-02-13
+
+### Changed
+- Bumped package version to 1.3.3.
+
+## [1.3.2] - 2024-02-09
+
+### Added
+- Added `-u` and `-p` options to login command.
+
+## [1.3.1] - 2023-12-20
+
+### Fixed
+- Fixed bug to resolve local files for recursive file upload.
+
+## [1.3.0] - 2023-12-18
+
+### Changed
+- Removed debug comments.
+
+## [1.2.0] - 2023-10-04
+
+### Changed
+- Follow-up recent specification changes about folder access level.
+
+## [1.1.1] - 2023-07-26
+
+### Changed
+- Set destination folder name using name attribute of folder copy API.