v2.1.0

Added

• Connection pooling support via ConnectionPool class
• Thread-safe connection reuse for concurrent access scenarios
• Optional pool parameter in SQLiteVecClient constructor
• examples/connection_pool_example.py demonstrating pooled connections
• Comprehensive tests for connection pooling in tests/test_pool.py

Improved

• Better resource management for multi-threaded applications
• Connection reuse reduces overhead in high-concurrency scenarios
• Backward compatible - pooling is optional