livekit 0.7.51 (2026-07-09)

Fixes

• feat: auto failover APIs with LK Cloud - #1196 (@davidzhao)
• Fix for dynacast error - #1213 (@MaxHeimbrock)
• Fix malformed RTC error handling
• Handle data track SID reassignment
• introduce LiveKitAPI construct, added smoke tests - #1220 (@davidzhao)
• Turn single peerconnection on by default - #1206 (@cnderrauber)