v0.4.1

[xt765]

[0.4.1] - 2026-01-26
Added
Abstract Event Model: Introduced Event abstract base class and BaseFormatter interface for better extensibility and support for multiple output formats.
Enhanced Async Handler: Added queue size limit (queue_size=1000) with drop policy to prevent memory overflow in high-traffic scenarios.
Improved Exception Handling: Enhanced exception logging to include full stack traces and error details.
Fixed
Context Loss Issue: Fixed LogContext._get_store() method to properly initialize contextvar when no context exists, preventing subsequent LookupError exceptions.
Concurrency Safety: Added thread locks in MermaidFileHandler._write_header() to prevent race conditions when writing file headers with delay=True.
Improved
Architecture Design: Decoupled components by introducing abstract interfaces, reducing tight coupling between FlowEvent and Mermaid-specific formatting.
Test Coverage: Increased test coverage to 90.17% by adding comprehensive test cases for the new abstract classes.
Code Maintainability: Added detailed English annotations to all code files, improving readability and developer experience.

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This discussion was created from the release v0.4.1.