- 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 caching headers (`Cache-Control`, `ETag`, `Last-Modified`) for file responses to improve client-side caching.
- Added HTTP admin routes for health check and authentication validation.
- Made `cache_max_age` configurable via server configuration with a default of 3600 seconds.
- Enhanced file handler with metadata-based `Last-Modified` computation.
- Updated integration tests to cover new functionality and ensure correctness.
- Implemented `DepotRepo` for repository access, including methods for catalog path, file path, and manifest retrieval.
- Introduced foundational HTTP routes for catalog, manifest, file, and package info retrieval.
- Added integration tests to validate repository setup and basic server functionality.
- Modularized HTTP handlers for better maintainability and extended them with new implementations like `info` and `manifest` handling.
- Refactored `main` function to simplify initialization and leverage reusable `run` logic in a new `lib.rs`.
- Updated `Cargo.toml` and `Cargo.lock` to include new dependencies: `walkdir` and updated testing utilities.
