- Transitioned the catalog backend from `redb` to `rusqlite` for better compatibility and concurrency.
- Updated `IpsProvider` to use SQLite for package querying, dependency resolution, and obsolescence handling.
- Removed `decode_manifest_bytes_local` and unused `manifest` cache logic.
- Simplified catalog-related functions and integrated `sqlite_catalog` module.
- Enhanced test functions and added schemas for managing SQLite databases.
- 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.
- Introduced a new `advice` module in the solver to provide user-oriented guidance for resolving dependency issues.
- Added structured failure details to `SolverError` for improved diagnosis and advice generation.
- Updated `pkg6` to display actionable advice when dependency resolution fails, including catalog refresh, publisher verification, and incorporation constraints.
- Enhanced CLI tools with a dangling dependency scan to identify and output unresolved stems.
- Improved modularity and caching mechanisms for catalog and manifest handling to support the advice system.
- Refined error messages and logging for better user feedback during installation errors.
- Replaced `CatalogProvider` with database-backed solution, improving manifest retrieval logic.
- Added fallback and LZ4 decoding support for catalog-stored manifests.
- Enhanced incorporation lock handling with direct database queries.
- Updated sample install script to use `debug` logging for better traceability.
- Added support for obsoleted package database with separate handling in `ImageCatalog`.
- Enhanced apply manifest functionality with progress callback support and processing statistics.
- Introduced LZ4 compression for manifest storage in `ImageCatalog`.
- Removed debugging eprintln statements, replaced with structured logging.
- Updated `pkg6` image creation and installation logic to improve user feedback and error handling.
- Updated database initialization and build processes to handle new obsoleted logic.
- 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.
- Cleaned up imports across multiple modules for better organization and removed unused dependencies.
- Eliminated `ActionOrder` implementation from `executors` as it's no longer being utilized.
- Simplified error handling in `get_dependencies` using `unwrap_or_else`.
- Optimized test setups with consistent use of `tempdir` helper function.
- Implemented `executors` module for applying manifests with support for directories, files, and links.
- Added `action_plan` module to merge and execute install plans from manifests.
- Introduced `run_sample_install.sh` script for testing installations, including dry-run and real execution.
- Enhanced `pkg6` install logic to resolve and apply action plans.
- Improved manifest management with `save_manifest` and repository-based fetching.
