perf: slow down DHT announcing on errors

[monkeyWie]

Fixed #1181, I noticed that the upstream has already fixed this issue, see anacrolix/torrent@48229c8

[codecov]

Codecov Report

❌ Patch coverage is 91.39785% with 8 lines in your changes missing coverage. Please review.
✅ Project coverage is 71.49%. Comparing base (a9eee26) to head (e9d3eeb).
⚠️ Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
internal/protocol/http/helper.go	78.57%	1 Missing and 2 partials ⚠️
internal/protocol/bt/fetcher.go	0.00%	2 Missing ⚠️
internal/protocol/http/fetcher.go	96.92%	1 Missing and 1 partial ⚠️
pkg/download/storage.go	90.90%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1186      +/-   ##
==========================================
- Coverage   71.74%   71.49%   -0.25%     
==========================================
  Files          47       47              
  Lines        5712     5757      +45     
==========================================
+ Hits         4098     4116      +18     
- Misses       1220     1237      +17     
- Partials      394      404      +10     

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[monkeyWie]

@copilot 修复这个问题，然后再重新根据CI test 里的测试命令进行测试验收，直到完全通过

[Copilot]

@monkeyWie I've opened a new pull request, #1232, to work on those changes. Once the pull request is ready, I'll request review from you.

[monkeyWie]

@monkeyWie I've opened a new pull request, #1232, to work on those changes. Once the pull request is ready, I'll request review from you.

@copilot CI还是有问题，继续找问题修复

[Copilot]

@monkeyWie I've opened a new pull request, #1233, to work on those changes. Once the pull request is ready, I'll request review from you.