- Replaced `values.get(0)` with `values.first()` for improved clarity and consistency across multiple files.
- Simplified conditional checks with `.is_empty()` and `format_args!` to enhance readability.
- Implemented `Default` trait for `VariableMode` directly within the enum.
- Updated error handling by boxing errors in `RepositoryError` and `CatalogError`.
- Replaced redundant `else` blocks with streamlined logic.
- Adjusted indentation and line breaks for structs, functions, and method calls to comply with Rust formatting standards.
- Improved error message formatting and consistency across `PkgTreeError` instances.
- Restructured long function arguments and chained calls for clarity and maintainability.
- Simplified conditional statements and loops for better readability.
- No functional changes introduced.
- Implemented incorporation lock functionality for packages, including pre-checks, addition, and retrieval methods.
- Enhanced package installation logic to handle incorporation constraints.
- Updated dependency versions in `Cargo.toml` and `Cargo.lock`, aligning with latest compatible releases.
- Introduced new tests to verify incorporation lock behavior, including scenarios with and without locks.
- Refactored code for improved readability and added error handling improvements.
- Fixed minor typos and inconsistencies in comments and log messages.
- Add methods to find and clean up obsoleted packages older than a specified TTL (`find_obsoleted_packages_older_than_ttl` and `cleanup_obsoleted_packages_older_than_ttl`) in `libips`.
- Implement a new `CleanupObsoleted` command in `pkg6repo` to handle cleanup operations.
- Update workspace `Cargo.toml` files with unified attributes for better consistency.
- Adjust dependencies (`libips` version patterns, `thiserror` updates) and enhance metadata management for obsoleted packages.
- Enhance repository operations by adding batch processing and robust logging during cleanup.
