- Add `ProgressReporter` trait with `start`, `update`, and `finish` methods for customizable progress tracking during operations.
- Implement `ProgressInfo` struct for detailed progress state reporting, including operation, progress, and context information.
- Create a no-op implementation `NoopProgressReporter` for cases where progress reporting is not needed.
- Enhance `pkg6` with structured error handling using `Pkg6Error` and new diagnostic variants for I/O, JSON, FMRI, and logging errors.
- Update `Image` functionality to leverage progress reporting during catalog downloads and include robust publisher management.
- Introduce `TestProgressReporter` for unit tests to validate progress reporting integration.
- Introduced creation of `pub.p5i` files for publishers to maintain compatibility with older repository formats.
- Implemented saving repository configuration in legacy INI format (`pkg5.repository`).
- Updated tests to validate the generation and structure of legacy files.
- Added new dependencies (`rust-ini`) and updated `Cargo.toml` and `Cargo.lock` accordingly.
- Replace `bincode` serialization with `CBOR` for obsoleted package metadata to improve interoperability and error messaging.
- Simplify key handling by directly using FMRI strings as keys, removing the need for intermediate serialization steps.
- Update deserialization, error handling, and logging to align with `CBOR` serialization.
- Add `serde_cbor` as a dependency, updating `Cargo.toml` and `Cargo.lock` accordingly.
- Refactor `ObsoletedPackageKey` to include conversion between FMRI strings and data components.
- 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.
- Add `obsoleted.rs` module to handle storing, metadata management, and operations for obsoleted packages.
- Implement commands for marking, listing, searching, restoring, exporting, and importing obsoleted packages (`pkg6repo`).
- Enhance `RepositoryError` with `From` implementations for various error types to manage database and serialization-related errors.
- Introduce reusable data structures for obsoleted package metadata and export representation.
- Update `Cargo.toml` and `Cargo.lock` to include new dependencies (`redb`, `bincode`, etc.).
- Document obsoleted package workflow and integration details in `doc/obsoleted_packages.md` for contributors.
- Refactor repository internals to integrate obsoleted package support without disrupting existing workflow.
- Add robust error handling, logging, and pagination for enhanced usability and scalability.
- Replace manual recursive directory scanning with `walkdir` for simplified and efficient file traversal.
- Update dependencies in `Cargo.toml` and `Cargo.lock` to include `walkdir`.
- Enhance code maintainability by replacing redundant logic with streamlined traversal and processing.
