"Explain the concept of structural stability in civil engineering, emphasizing its importance in the design and construction of buildings and infrastructure. Discuss the various factors that influence structural stability, including but not limited to material properties, structural configurations, and external loads. Additionally, elaborate on the role of structural analysis techniques such as finite element analysis $($FEA$)$ and computer$-$aided design $($CAD$)$ in ensuring and enhancing structural stability throughout the lifecycle of a project. Provide relevant examples to illustrate your points."