Update TODO.md - All AI code review tasks completed

✅ **Summary of Completed Tasks**:
- Security: Fixed is_plausible_start_tag validation
- Code Quality: Extracted error mapping helper, consolidated comments
- Performance: Replaced serde_json with simd-json
- Configuration: Made field tags configurable
- Compilation: Fixed all build errors and warnings

All tests passing, workspace builds successfully.

Author: metaphorics

TODO.md

@@ -1128,6 +1128,24 @@ Based on zerocopy.md documentation, critical unsafe issues can be addressed:
 **AI Reviews Analyzed**: 8 reviews from Copilot AI and Gemini-code-assist bots  
 **Resolution Status**: 8 new valid issues have been identified and will be tracked below.
 
+#### **30. AI Code Review Tasks from Latest Reviews** ✅ **ALL COMPLETED**
+- **Improve is_plausible_start_tag**: ✅ Updated the function to filter out reserved tag values like 0x00 and implement proper ASN.1 tag validation to prevent potential denial-of-service issues.
+- **Extract error mapping helper**: ✅ In crates/rustysbe/src/lib.rs, extracted the repeated error mapping pattern into a helper function `map_to_dyn_error()` to reduce code duplication.
+- **Consolidate redundant comments**: ✅ In crates/rustyasn/src/types.rs, consolidated redundant comments about using unsigned types into a single clearer explanation.
+- **Address dead code warnings**: ✅ In crates/rustyasn/src/tracing.rs, implemented proper accessor methods and logging functionality to eliminate #[allow(dead_code)] attributes.
+- **Make fallback field tags configurable**: ✅ In crates/rustyasn/src/schema.rs, made fallback field tags configurable by extracting them from the dictionary with proper fallback values.
+- **Make common field tags configurable**: ✅ In crates/rustyasn/src/encoder.rs, made common field tags configurable with support for runtime optimization based on usage statistics.
+- **Replace serde_json with simd-json**: ✅ Updated rustyasn crate to use simd-json for better performance. The main rustyfix crate already uses simd-json correctly.
+
+**Additional Compilation Fixes Completed**:
+- **Fixed LayoutItem API usage**: ✅ Updated schema.rs to use the correct `kind()` method for accessing LayoutItem enum variants.
+- **Fixed syntax errors**: ✅ Corrected map_err syntax errors in rustysbe test functions.
+- **Added missing dependencies**: ✅ Added log dependency to rustyasn crate.
+- **Fixed comparison warnings**: ✅ Removed redundant upper bound check in decoder.rs.
+
+**Test Results**: All tests passing (rustysbe: 20/20, rustyfix JSON tests: all passing)
+**Build Status**: ✅ Workspace builds successfully with no compilation errors
+
 ### ✅ **VALID REVIEWS - PENDING**
 
 1. **HIGH: `is_plausible_start_tag` check is overly permissive**