v0.2.0: Source Tracking & Framework Expansion

🚀 Highlights

• Precise Source Variable Tracking: Accurate identification of untrusted input origins.
• Sink-Aware Rule IDs: Granular rule classification from PYA-101 to PYA-108.
• Framework Expansion: Built-in detection for Flask, Django, and high-risk modules like Pickle/YAML.
• 100% Reporter Test Coverage: Robust validation for SARIF, JSON, and Text outputs.