QDLDL Factorization

QDLDL is a Python wrapper for the QDLDL C library, providing a high-performance LDL factorization routine primarily for sparse matrices. It's designed for use in optimization and numerical methods, particularly for solving symmetric indefinite systems like those arising in KKT matrices. The current version is 0.1.9.post1, with updates released periodically to support newer Python versions, architectures, and upstream C library improvements.