fix(multicall): resolve critical multicall parsing corruption issues

- Added comprehensive bounds checking to prevent buffer overruns in multicall parsing
- Implemented graduated validation system (Strict/Moderate/Permissive) to reduce false positives
- Added LRU caching system for address validation with 10-minute TTL
- Enhanced ABI decoder with missing Universal Router and Arbitrum-specific DEX signatures
- Fixed duplicate function declarations and import conflicts across multiple files
- Added error recovery mechanisms with multiple fallback strategies
- Updated tests to handle new validation behavior for suspicious addresses
- Fixed parser test expectations for improved validation system
- Applied gofmt formatting fixes to ensure code style compliance
- Fixed mutex copying issues in monitoring package by introducing MetricsSnapshot
- Resolved critical security vulnerabilities in heuristic address extraction
- Progress: Updated TODO audit from 10% to 35% complete

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

docs/8_reports/PROJECT_COMPLETION_ANALYSIS.md

@@ -74,7 +74,7 @@ The MEV Bot project has achieved significant progress with the completion of cri
 - **Environment Config**: 80% (comprehensive env vars)
 - **Build System**: 70% (Makefile, scripts)
 - **Docker Support**: 40% (basic Dockerfile)
-- **CI/CD Pipeline**: 30% (GitHub Actions started)
+- **CI/CD Pipeline**: 40% (Drone + Harness pipelines drafted; GitHub Actions being sunset)
 - **Documentation**: 60% (comprehensive README, some docs)
 
 ### ⚠️ PHASE 10: Advanced Features (25% → 25%)