fix(core): improve SmartPdf lifecycle management and update dependencies

changelog.md

@@ -1,5 +1,20 @@
 # Changelog
 
+## 2025-08-01 - 0.5.8 - fix(core)
+Fix SmartPdf lifecycle management and update dependencies
+
+- Moved SmartPdf instance management to the MultiModalModel base class for better resource sharing
+- Fixed memory leaks by properly implementing cleanup in the base class stop() method
+- Updated SmartAi class to properly stop all providers on shutdown
+- Updated @push.rocks/smartrequest from v2.1.0 to v4.2.1 with migration to new API
+- Enhanced readme with professional documentation and feature matrix
+
+## 2025-07-26 - 0.5.7 - fix(provider.openai)
+Fix stream type mismatch in audio method
+
+- Fixed type error where OpenAI SDK returns a web ReadableStream but the audio method needs to return a Node.js ReadableStream
+- Added conversion using Node.js's built-in Readable.fromWeb() method
+
 ## 2025-07-25 - 0.5.5 - feat(documentation)
 Comprehensive documentation enhancement and test improvements