fix: completion event was lost when an error occurred

[welkeyever]

What type of PR is this?

fix

Check the PR title.

• This PR title match the format: <type>(optional scope): <description>
• The description of this PR title is user-oriented and clear enough for others to understand.

(Optional) Translate the PR title into Chinese.

修复发生错误时 trace 完成事件丢失的问题（读header/body & 写header/body）

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

en: fix the issue where the completion event was lost when an error occurred && add UTs
zh(optional): 修复错误发生时完成事件丢失的问题 && 添加单测

Which issue(s) this PR fixes:

None

[codecov]

Codecov Report

Base: 69.34% // Head: 70.97% // Increases project coverage by +1.62% 🎉

Coverage data is based on head (b6eb212) compared to base (81332e6).
Patch coverage: 86.95% of modified lines in pull request are covered.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop     #525      +/-   ##
===========================================
+ Coverage    69.34%   70.97%   +1.62%     
===========================================
  Files           93       93              
  Lines         8874     8926      +52     
===========================================
+ Hits          6154     6335     +181     
+ Misses        2355     2202     -153     
- Partials       365      389      +24     

Impacted Files	Coverage Δ
pkg/protocol/http1/server.go	62.31% <86.95%> (+62.31%)	⬆️
pkg/network/netpoll/connection.go	73.33% <0.00%> (-7.16%)	⬇️
pkg/app/fs.go	68.65% <0.00%> (ø)
pkg/app/context.go	84.30% <0.00%> (ø)
pkg/protocol/request.go	83.24% <0.00%> (ø)
pkg/app/client/client.go	74.39% <0.00%> (ø)
pkg/common/ut/request.go	93.10% <0.00%> (ø)
pkg/route/routergroup.go	77.06% <0.00%> (ø)
pkg/common/errors/errors.go	87.95% <0.00%> (ø)
pkg/app/server/binding/binding.go	81.81% <0.00%> (ø)
... and 5 more

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