Feat/add more metrics

[LinZexiao]

关联的Issues (Related Issues)

ref filecoin-project/venus#6051

改动 (Proposed Changes)

附注 (Additional Info)

自查清单 (Checklist)

在你认为本 PR 满足被审阅的标准之前，需要确保 / Before you mark the PR ready for review, please make sure that:

• 符合Venus项目管理规范中关于PR的相关标准 / The PR follows the PR standards set out in the Venus project management guidelines
• 具有清晰明确的commit message / All commits have a clear commit message.
• 包含相关的的测试用例或者不需要新增测试用例 / This PR has tests for new functionality or change in behaviour or not need to add new tests.
• 包含相关的的指南以及文档或者不需要新增文档 / This PR has updated usage guidelines and documentation or not need
• 通过必要的检查项 / All checks are green

[codecov-commenter]

Codecov Report

Merging #163 (c970795) into master (08ab3ab) will increase coverage by 1.04%.
The diff coverage is 31.03%.

❗ Your organization needs to install the Codecov GitHub app to enable full functionality.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #163      +/-   ##
==========================================
+ Coverage   70.60%   71.65%   +1.04%     
==========================================
  Files          26       26              
  Lines        1987     1972      -15     
==========================================
+ Hits         1403     1413      +10     
+ Misses        514      490      -24     
+ Partials       70       69       -1     

Flag	Coverage Δ
unittests	71.65% <31.03%> (+1.04%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files	Coverage Δ
marketevent/market_event.go	91.15% <100.00%> (ø)
metrics/metrics.go	100.00% <100.00%> (ø)
proofevent/proof_event.go	90.44% <100.00%> (ø)
walletevent/wallet_event.go	74.12% <ø> (-0.18%)	⬇️
metrics/exporter.go	57.14% <33.33%> (+27.51%)	⬆️
metrics/record_metrics_loop.go	13.63% <0.00%> (+13.63%)	⬆️

... and 3 files with indirect coverage changes

[simlecode]

lgtm