[FEATURE] Advanced Connection Management with Pooling and Recovery

[orenlab]

📋 Description

Implement enterprise-grade connection management features including connection pooling, persistent connections, automatic recovery, and concurrency control.

🎯 Objectives

• Implement configurable connection pooling
• Add persistent connections with keep-alive
• Create automatic connection recovery mechanisms
• Add semaphore-based concurrency control
• Optimize performance for high-throughput scenarios

📝 Detailed Requirements

Connection Pooling:

# Configuration example
pool_config = {
    'pool_size': 10,
    'max_overflow': 5,
    'timeout': 30,
    'recycle': 3600,
    'pre_ping': True
}

Features to Implement:

1. Connection Pool Management

   • Configurable pool size (default: 10)
   • Connection reuse optimization
   • Pool health monitoring
   • Graceful shutdown handling

2. Persistent Connections

   • HTTP/1.1 keep-alive support
   • Connection lifetime management
   • Idle connection cleanup

3. Connection Recovery

   • Exponential backoff retry logic
   • Circuit breaker pattern implementation
   • Connection health checks
   • Automatic failover mechanisms

4. Concurrency Control

   • Semaphore for request limiting
   • Configurable concurrent request limits
   • Request queue management
   • Deadlock prevention

🧪 Acceptance Criteria

• Connection pool reduces connection overhead by 70%+
• Automatic recovery from network failures
• Configurable concurrency limits work correctly
• No memory leaks in long-running applications
• Performance benchmarks show improvement
• Circuit breaker prevents cascade failures

🎯 Performance Targets

• 50% reduction in connection establishment time
• Support for 100+ concurrent requests
• 99.9% connection success rate
• <100ms recovery time from network issues

🧪 Testing Requirements

• Unit tests for all pool operations
• Integration tests with real network conditions
• Load testing with concurrent requests
• Failure scenario testing (network drops, timeouts)
• Memory leak testing for long-running processes

📚 Documentation Requirements

• Connection pool tuning guide
• Performance optimization best practices
• Troubleshooting guide for connection issues
• Benchmark results and comparisons

[orenlab]

Added in #12