🔧 High Priority: Replace .unwrap() calls with proper error handling

[quantumshiro]

Problem

The codebase has 56+ files with excessive use of .unwrap() calls, creating panic-prone error handling that violates production code standards.

Critical Files Affected

• src/modular/unified_orchestrator.rs - Multiple unwrap calls in critical paths
• src/modular/execution.rs - Transaction processing with unsafe unwraps
• src/blockchain/block.rs - Block validation logic with panics
• src/network/p2p_enhanced.rs - Network operations with unwraps
• src/crypto/ modules - Cryptographic operations with unsafe unwraps

Required Changes

• Replace .unwrap() with proper Result handling and ? operator
• Add meaningful error messages and context
• Implement proper error propagation chains
• Add error recovery mechanisms where appropriate
• Update function signatures to return Result<T, E> types

Error Handling Standards

// ❌ Before: Panic-prone
let result = risky_operation().unwrap();

// ✅ After: Proper error handling
let result = risky_operation()
    .map_err( < /dev/null | e| ProcessingError::OperationFailed(e.to_string()))?;

Definition of Done

• Zero .unwrap() calls in production code paths
• All error cases have meaningful error messages
• Error handling follows consistent patterns
• Tests verify error scenarios
• cargo clippy --lib -- -D warnings passes

Priority: 🔥 High

Critical for production stability and follows CLAUDE.md quality standards.

Estimated Effort: 4-5 days