docs: Update README to highlight enterprise architecture and code quality

- Add Enterprise Grade features to Key Highlights
- Emphasize Zero Warnings Policy and SOLID principles
- Highlight production-ready features and thread safety
- Reorganize latest features into Architecture & Code Quality section
- No version bump - internal architecture improvements only

Author: byerlikaya

README.md

@@ -21,6 +21,7 @@ SmartRAG is a **production-ready** .NET 9.0 library that provides a complete **R
 - 📄 **Multi-Format**: PDF, Word, text files with intelligent parsing
 - 🎯 **Enhanced Semantic Search**: Advanced hybrid scoring with 80% semantic + 20% keyword relevance
 - 🔍 **Smart Document Chunking**: Word boundary validation and optimal break points for context preservation
+- ✅ **Enterprise Grade**: Zero Warnings Policy, SOLID principles, comprehensive logging, XML documentation
 
 ## 🎯 What Makes SmartRAG Special
 
@@ -42,6 +43,8 @@ SmartRAG is a **production-ready** .NET 9.0 library that provides a complete **R
 - **Dependency Injection**: Full DI container integration
 - **Enhanced Semantic Search**: Advanced hybrid scoring combining semantic similarity and keyword relevance
 - **VoyageAI Integration**: High-quality embeddings for Anthropic Claude models
+- **Enterprise Architecture**: Zero Warnings Policy, SOLID/DRY principles, comprehensive XML documentation
+- **Production Ready**: Thread-safe operations, centralized logging, proper error handling
 
 ## 🧠 Smart Query Intent Detection
 
@@ -603,13 +606,14 @@ We welcome contributions!
 - 🧹 **Configuration Cleanup** - Removed unnecessary fields
 - 🎯 **Project Simplification** - Streamlined for better performance
 
-### **Latest Features (Development)**
+### **Architecture & Code Quality**
 - 🎯 **Enhanced Semantic Search** - Advanced hybrid scoring (80% semantic + 20% keyword)
 - 🔍 **Smart Document Chunking** - Word boundary validation and optimal break points
 - 🧠 **SemanticSearchService** - Dedicated service for semantic relevance scoring
-- ⚙️ **Configuration Binding Fix** - User settings now take absolute priority
-- 🔧 **Improved Error Handling** - Better logging and retry mechanisms
+- ⚙️ **Configuration Management** - User settings take absolute priority
+- 🔧 **Enterprise Error Handling** - Comprehensive logging and retry mechanisms
 - 📊 **Performance Optimizations** - Faster chunking and search algorithms
+- ✅ **Code Quality** - SOLID principles, zero warnings, comprehensive documentation
 
 ## 📚 Resources