[mercury]: Add comments

[Ivanbeethoven]

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Name	Status	Preview	Comments	Updated (UTC)
mega	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Jul 22, 2025 3:07am

[Copilot]

Pull Request Overview

This PR introduces refactorings to streamline blob creation, enriches documentation, marks key structs as non-exhaustive for future extension, and updates dependencies.

• Replaced repeated manual Blob construction with Blob::from_content in diff and change logic
• Added documentation comments and #[non_exhaustive] attributes on several object types
• Bumped axum and bincode versions and removed unused dependencies in Cargo.toml

Reviewed Changes

Copilot reviewed 9 out of 9 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
scorpio/src/manager/diff.rs	Refactored manual Blob construction to Blob::from_content calls
scorpio/src/manager/commit.rs	Simplified new Tree creation using Tree::from_tree_items
scorpio/Cargo.toml	Updated axum to 0.8.4, bincode to 2.0.1; removed unused dependencies
mercury/src/internal/pack/encode.rs	Added doc comment linking to Git’s delta selection heuristics
mercury/src/internal/pack/cache.rs	Translated directory‐creation comment to English
mercury/src/internal/object/tree.rs	Added #[non_exhaustive] to Tree struct
mercury/src/internal/object/tag.rs	Added #[non_exhaustive] to Tag and clarified unsafe UTF-8 conversion comment
mercury/src/internal/object/commit.rs	Introduced format_message method and enhanced parent commit parsing comments
mercury/src/internal/object/blob.rs	Added #[non_exhaustive] to Blob and cleaned up test formatting

Comments suppressed due to low confidence (2)

mercury/src/internal/object/commit.rs:126

• Add unit tests for format_message to verify its behavior on messages with and without PGP signatures.

    pub fn format_message(&self) -> String {

mercury/src/internal/object/commit.rs:160

• [nitpick] The variable name binding is ambiguous; consider renaming it to something more descriptive like remaining_data or post_tree_data.

        let binding = commit[tree_end + 1..].to_vec(); // Move past the tree id 

[Ivanbeethoven]

The dependency libraries for Scorpio have been updated.