- Introduce a two-level directory structure for file paths (`xx/yy/hash`) in `pkg5_import.rs` for improved scalability, with fallback to the old structure for compatibility.
- Remove outdated end-to-end tests for `pkg5` imports, reducing redundancy and streamlining test coverage.
- 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.