feat: improve observability of hostclient

[Duslia]

What type of PR is this?

feat

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提高 hostclient 的可观测性

(Optional) More detail description for this PR(en: English/zh: Chinese).

en: Improve observability of hostclient. Add HostClientState interface and provide method to inject observation function. Launch a goroutine to call the observation function after creating HostClient
zh(optional): 提高 hostclient 的可观测性。增加 HostClientState 接口，并可注入观测函数。在创建 HostClient 后，启动协程调用观测函数

Which issue(s) this PR fixes:

[codecov]

Codecov Report

Base: 69.69% // Head: 69.54% // Decreases project coverage by -0.14% ⚠️

Coverage data is based on head (5f086d0) compared to base (a7a3fc0).
Patch coverage: 50.00% of modified lines in pull request are covered.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop     #380      +/-   ##
===========================================
- Coverage    69.69%   69.54%   -0.15%     
===========================================
  Files           93       93              
  Lines         8760     8791      +31     
===========================================
+ Hits          6105     6114       +9     
- Misses        2293     2314      +21     
- Partials       362      363       +1     

Impacted Files	Coverage Δ
pkg/common/config/client_option.go	100.00% <ø> (ø)
pkg/common/errors/errors.go	87.95% <ø> (ø)
pkg/protocol/http1/client.go	49.80% <6.66%> (-1.21%)	⬇️
pkg/app/client/option.go	96.66% <83.33%> (-3.34%)	⬇️
pkg/app/client/client.go	74.84% <100.00%> (+0.15%)	⬆️
pkg/common/timer/timer.go	61.90% <0.00%> (-19.05%)	⬇️
pkg/common/compress/compress.go	80.95% <0.00%> (-2.86%)	⬇️

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