chore: bind helper metadata candidate manifest

cai

2026-08-08 6f96f3de875d3711e6c2d4c8fc3fbdcdb00c9173

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