v0.7.0

[0.7.0] - 2026-02-24
Added
Unified CLI: Refactored the CLI to provide a unified experience. mermaid-trace serve now defaults to the enhanced Web preview server (Master mode) with hot-reload, pan/zoom, and directory browsing.
Single File Preview: Added support for previewing single .mmd files with full Web UI capabilities.
Distributed Tracing Simulation: Added examples/10_distributed_trace_simulation.py to demonstrate Trace Context propagation.
Custom Masking: Added examples/11_custom_masking.py for advanced data sanitization.
Data Privacy: Introduced DataMasker to automatically sanitize sensitive fields (e.g., password, token) in function arguments, return values, and dictionaries. Configurable via config.mask_patterns.
Sampling Strategy: Added config.sample_rate to control the percentage of traces recorded, reducing overhead in high-throughput production environments.
Distributed Tracing: Enhanced FastAPI middleware to support W3C Trace Context, B3, and custom X-Trace-ID headers, enabling cross-service trace propagation.
Context Management: Added is_sampled state to LogContext to efficiently propagate sampling decisions across async call chains.
Improved
Mermaid Rendering: Fixed syntax errors caused by special characters (e.g., < , >) in Python object representations by implementing HTML entity escaping.
LangChain Integration: Enhanced robustness of examples/09_langchain_integration.py to support mock execution without installed dependencies.
Test Suite: Comprehensive update of the test suite, achieving >90% coverage with new tests for sanitization, sampling, and distributed tracing scenarios.
Documentation: Updated READMEs and examples to showcase data masking, sampling features, and the new CLI usage.
Fixed
Type Safety: Resolved Mypy errors in LogContext, server.py and example scripts.