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

pyproject.toml

@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "mdrs-client-python"
-version = "1.3.17"
+version = "1.3.18"
 description = "The mdrs-client-python is python library and a command-line client for up- and downloading files to and from MDRS based repository."
 authors = ["Yoshihiro OKUMURA <yoshihiro.okumura@riken.jp>"]
 license = "MIT"
@@ -28,7 +28,7 @@ requests = "^2.34.2"
 requests-toolbelt = "^1.0.0"
 python-dotenv = "^1.1.0"
 pydantic = "^2.13.4"
-pydantic-settings = "^2.14.1"
+pydantic-settings = "^2.14.2"
 PyJWT = "^2.13.0"
 validators = "^0.35.0"
 
@@ -37,7 +37,7 @@ black = "^26.5.1"
 flake8 = "^7.2.0"
 Flake8-pyproject = "^1.2.3"
 isort = "^8.0.1"
-pyright = "^1.1.401"
+pyright = "^1.1.411"
 
 [tool.poetry.scripts]
 mdrs = 'mdrsclient.__main__:main'