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>

README.md

@@ -43,24 +43,29 @@ This production-ready MEV bot provides real-time monitoring of Arbitrum's sequen
 - **PostgreSQL 13+** - Database for state management
 - **Arbitrum RPC access** - WebSocket endpoint required
 
-### Installation
+### Installation & Setup
 
 ```bash
 # Clone the repository
 git clone <repository-url>
 cd mev-beta
 
-# Install dependencies
+# Provision default environment files and directories
+./setup-env.sh
+
+# Sync Go modules and vendor checksums
 go mod tidy
 
-# Build the bot
+# Build the bot binary (bin/mev-bot)
 make build
+```
 
 ### Configuration
 
 ```bash
 # Set required environment variables
-export ARBITRUM_RPC_ENDPOINT="wss://arbitrum-mainnet.core.chainstack.com/f69d14406bc00700da9b936504e1a870"
+export ARBITRUM_RPC_ENDPOINT="wss://arbitrum-mainnet.core.chainstack.com/53c30e7a941160679fdcc396c894fc57"
+export ARBITRUM_WS_ENDPOINT="wss://arbitrum-mainnet.core.chainstack.com/53c30e7a941160679fdcc396c894fc57"
 export MEV_BOT_ENCRYPTION_KEY="$(openssl rand -base64 32)"
 
 # Optional configuration
@@ -68,6 +73,7 @@ export LOG_LEVEL="info"
 export METRICS_ENABLED="true"
 export METRICS_PORT="9090"
 ```
+Update `.env` with Ethereum key material per `docs/5_development/CONFIGURATION.md` before executing live trades.
 
 ### Running the Bot
 
@@ -92,8 +98,7 @@ make test
 go test ./pkg/arbitrum/...
 
 # Run with coverage
-go test -coverprofile=coverage.out ./...
-go tool cover -html=coverage.out
+make test-coverage
 ```
 
 ## 📊 Project Status