feat: initialize livekit runtime helper

cai

2026-06-25 14ac58661f657c652a6732a7d39228c0aada3e39

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[source.crates-io] 
replace-with = "rsproxy" 
 
[source.rsproxy] 
registry = "sparse+https://rsproxy.cn/index/" 
 
[net] 
retry = 5