Chore/fixing cache desync

[sn]

This pull request introduces several important improvements to the nitro-datastore package, focusing on enhanced security for file saving, improved cache consistency for data views, and more robust test coverage. The changes also include a version bump to 1.0.6.

Security and File Saving Enhancements:

• Added a base_dir parameter to the NitroDataStore.save() method, restricting file saves to a specified directory, and implemented path traversal protection to prevent writing outside this directory. The method now resolves and validates the target path before creating any directories, raising a ValueError if traversal is detected. [1] [2]
• Added comprehensive tests to verify that save() enforces the base_dir restriction, blocks path traversal and absolute paths outside the sandbox, and does not create unauthorized directories.

Cache Consistency and Performance:

• Improved the cache key for path listing in list_paths() to include the data object's identity, ensuring correct cache scoping for subviews and preventing collisions.
• Modified the internal value wrapping logic so that child NitroDataStore views share the parent’s path cache, ensuring cache invalidation propagates across all views of the same data.
• Added a suite of tests to verify that cache invalidation is consistent across parent, child, and sibling views, and that mutations in one view are reflected in others.

Versioning:

• Bumped the package version to 1.0.6 in both __init__.py and pyproject.toml. [1] [2]

These changes improve the package’s security posture, data consistency, and reliability, especially in multi-view and file operation scenarios.