- Migrated `_SIGNATURE` handling in `CatalogPart`, `UpdateLog`, and `PackageUpdateEntry` to use metadata fields.
- Introduced `set_signature` and `signature` methods for cleaner access and manipulation of signature data.
- Updated deserialization logic to accommodate flattened metadata storage.
- Improved structure by centralizing signature and metadata interactions.
- 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.
- Corrected FMRI formatting to `pkg:/name` for entries without a publisher.
- Excluded `pkg.fmri` from summary action extraction in file backend.
- Removed unused signature handling in catalog package processing.
- Reordered `PackageVersionEntry` struct fields for logical consistency.
- Removed unnecessary spaces in JSON key-value and array formatting for Python-style compatibility.
- Enhanced `format_iso8601_basic` to ensure precise microsecond-level time formatting.
- Updated `write_update_log` to return and store SHA-1 signatures for update log verification.
- Added `/file/1/{digest}` route to support file retrieval without specifying the algorithm.
- Implemented a Python-compatible JSON serializer to ensure consistent formatting for catalog artifacts.
- Replaced `HashMap` with `BTreeMap` for deterministic ordering in catalog serialization and updates.
- Updated integration tests to validate the new route functionality and ensure response correctness.
- Refactored `format_iso8601_basic` to improve timestamp formatting consistency.
- Introduced `write_catalog_attrs`, `write_catalog_part`, and `write_update_log` functions for streamlined and secure file writing.
- Refactored `file_backend` to use `catalog_writer` for managing catalog updates, improving readability and maintainability.
- Updated `save_catalog_attrs`, `save_catalog_part`, and `append_update` to leverage atomic writes and ensure signature computation.
- Replaced manual serialization logic with centralized writing utilities for consistency and error resilience.
- Updated dependencies for JSON handling and signature computation.
- Introduced `Image::refresh_catalogs` to support refreshing catalogs selectively or fully for specified publishers.
- Enhanced `CatalogManager::load` to handle missing fields gracefully, including fallback mechanisms for `packages`.
- Added detailed logging and error diagnostics for catalog parsing and directory operations.
- Improved publisher-specific directory management, including cleaning and recreating directories during full refresh.
- Updated tests to verify correct behavior for catalog directory clearing and new catalog handling logic.
- Introduced the `ImageType` enum to support both `Full` and `Partial` image types during creation.
- Updated `Image::create_image` to accept `ImageType` as a parameter.
- Enhanced logging with detailed debug statements for catalog building, image queries, and package processing.
- Refactored CLI to include a new `--type` option for specifying image type during image creation.
- Simplified path determination logic in `pkg6` with a new `determine_image_path` helper function.
- Removed unused imports and unnecessary file checks for cleaner code.
- Standardize formatting by aligning and cleaning up indentation, spacing, and line breaks across multiple modules.
- Enhance logging with improved message formatting for better context and readability.
- Simplify error handling in `pkg6dev`, `pkg6repo`, and core libraries by consolidating redundant patterns and improving clarity.
- Update test cases to reflect formatting and logging changes while extending coverage of edge cases.
- Perform general cleanup, including removing unused imports, refining comments, and ensuring consistent style.
