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/master-plan/11-deployment-monitoring.md

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+# Deployment and Monitoring Plan
+
+## Overview
+
+This document outlines the deployment strategy and monitoring requirements for the exchange-specific helper libraries in the MEV bot project.
+
+## Deployment Strategy
+
+### Environment Configuration
+- Development: Local environment with testnet contracts
+- Staging: Private network with mainnet contracts
+- Production: Mainnet with proper security measures
+
+### Deployment Process
+1. Automated build and compilation
+2. Pre-deployment validation checks
+3. Staging environment testing
+4. Production deployment
+5. Post-deployment health verification
+
+### Configuration Management
+- Environment-specific configuration files
+- Secure credential management
+- Feature flagging for gradual rollouts
+- Contract address management per network
+- API key and endpoint management
+
+## Monitoring Requirements
+
+### Performance Metrics
+- API response times
+- Transaction execution latency
+- Gas cost tracking
+- Throughput measurements
+- Success/failure rates
+
+### Business Metrics
+- Number of successful swaps
+- Liquidity operations executed
+- Arbitrage opportunities captured
+- Profitability tracking
+- Exchange utilization rates
+
+### System Metrics
+- Memory usage
+- CPU utilization
+- Network I/O
+- Database performance
+- Error rates
+
+## Alerting System
+
+### Critical Alerts
+- Failed transactions
+- Security incidents
+- Significant performance degradation
+- Profitability drops
+- Exchange connectivity issues
+
+### Warning Alerts
+- High slippage in trades
+- Low liquidity pools
+- Unusual price differences
+- API rate limiting
+- Memory usage approaching limits
+
+### Monitoring Tools
+- Prometheus for metrics collection
+- Grafana for dashboard visualization
+- AlertManager for notification routing
+- ELK stack for log analysis
+- Custom health check endpoints
+
+## Logging Strategy
+
+### Log Levels
+- DEBUG: Detailed diagnostic information
+- INFO: General operational information
+- WARN: Potential issues requiring attention
+- ERROR: Problems in operation
+- CRITICAL: Critical problems requiring immediate attention
+
+### Log Content
+- Transaction details and outcomes
+- Performance metrics
+- Error stack traces
+- Exchange communication logs
+- Profitability calculations
+
+### Log Management
+- Structured logging format (JSON)
+- Centralized log aggregation
+- Log retention policies
+- Log rotation and archival
+- Searchable log indices
+
+## Security Monitoring
+
+### Anomaly Detection
+- Unusual transaction patterns
+- Abnormal gas consumption
+- Unexpected contract interactions
+- Suspicious API access patterns
+- Deviation from expected behavior
+
+### Compliance Tracking
+- Transaction volume monitoring
+- Profit reporting
+- Risk exposure tracking
+- Regulatory compliance checks
+- Audit trail maintenance
+
+## Maintenance Procedures
+
+### Regular Maintenance
+- Dependency updates
+- Security patching
+- Performance tuning
+- Database optimization
+- Configuration reviews
+
+### Incident Response
+- Issue detection and classification
+- Escalation procedures
+- Rollback strategies
+- Communication protocols
+- Post-incident analysis
+
+## Rollback Plan
+
+### Automated Rollback Conditions
+- Critical system failures
+- Security vulnerabilities
+- Significant profit degradation
+- Unforeseen side effects
+
+### Rollback Procedures
+- Version rollback to last known good state
+- Configuration rollback
+- Database migration reversal
+- Health check verification
+- Communication to stakeholders
+
+## Backup and Recovery
+
+### Data Backup
+- Configuration files
+- Transaction history
+- Performance metrics
+- Log archives
+- Database snapshots
+
+### Recovery Procedures
+- System restoration from backups
+- Data integrity verification
+- Service verification
+- Communication to stakeholders
+- Post-recovery validation
+
+## Performance Optimization
+
+### Continuous Optimization
+- Regular performance profiling
+- Query optimization
+- Resource allocation adjustment
+- Caching strategy review
+- Algorithm efficiency improvements
+
+### Scaling Considerations
+- Horizontal scaling capabilities
+- Load balancing mechanisms
+- Database connection management
+- Caching layer optimization
+- Circuit breaker implementation