📝 Add docstrings to codex/define-extractors-and-implement-frommessagerequest

[coderabbitai]

Docstrings generation was requested by @leynos.

• Implement extractor types and update docs #79 (comment)

The following files were modified:

• src/extractor.rs
• tests/extractor.rs

These file types are not supported

• README.md
• docs/rust-binary-router-library-design.md

ℹ️ Note

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Summary by Sourcery

Add missing documentation comments to the extractor module and its tests to clarify the purpose and behavior of error formatting, dereferencing, message extraction, and connection info extraction.

Enhancements:

• Add docstrings for ExtractError’s Display and source methods.
• Document deref implementations for SharedState and Message and the Message::into_inner method.
• Add documentation comments to FromMessageRequest implementations for Message and ConnectionInfo.

Tests:

• Annotate extractor tests with descriptive doc comments for payload parsing, peer address reporting, shared state extraction, and missing state error.

[sourcery-ai]

Reviewer's Guide

Adds comprehensive Rustdoc comments to the extractor module and its unit tests, documenting error formatting, trait implementations (Display, Error, Deref, FromMessageRequest), and clarifying test intentions.

File-Level Changes

Change	Details	Files
Documented error display and source reporting	Added doc comments to Display::fmt describing missing state and decode errors Added doc comments to Error::source explaining underlying error retrieval	src/extractor.rs
Documented deref and inner-value accessors	Added doc comment to SharedState to explain transparent inner-value access Added doc comment to Message::into_inner detailing consumption and return of inner value Added doc comment to Message to describe dereferencing behavior	src/extractor.rs
Documented FromMessageRequest implementations	Added doc comment to Message::from_message_request explaining extraction and error conditions Added doc comment to ConnectionInfo::peer_addr describing its purpose Added doc comment to ConnectionInfo::from_message_request highlighting infallible metadata extraction	src/extractor.rs
Documented unit tests	Added doc comment to message_extractor_parses_and_advances outlining parsed payload and cursor advancement Added doc comment to connection_info_reports_peer stating peer-address extraction Added doc comment to shared_state_extractor describing shared-state insertion and extraction Added doc comment to shared_state_missing_error explaining expected missing-state error	tests/extractor.rs

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