chore: random index for load balance the server list.

[CherishCai]

No description provided.

[codecov-commenter]

Codecov Report

Patch coverage has no change and project coverage change: -0.01 ⚠️

Comparison is base (2235aae) 8.94% compared to head (768e5b3) 8.94%.

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Additional details and impacted files

@@           Coverage Diff            @@
##            main    #164      +/-   ##
========================================
- Coverage   8.94%   8.94%   -0.01%     
========================================
  Files         49      49              
  Lines       2739    2740       +1     
========================================
  Hits         245     245              
- Misses      2494    2495       +1     

Impacted Files	Coverage Δ
src/common/remote/grpc/server_list_service.rs	43.24% <0.00%> (-1.21%)	⬇️
src/naming/mod.rs	0.00% <0.00%> (ø)

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[onewe]

我建议 新开一个模块 里面放 server_list 的各种实现, 不直接在 PollingServerListService 中改

[CherishCai]

我建议 新开一个模块 里面放 server_list 的各种实现, 不直接在 PollingServerListService 中改

会不会比较复杂？不过未来支持 server-list-endpoint 确实可以这样搞。

[onewe]

LGTM