[feat][backend]: refactor offline metric & support space_id skip

[kidkidkid]

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[codecov]

Codecov Report

❌ Patch coverage is 91.30435% with 2 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
...servability/application/convertor/metric/metric.go	89.47%	1 Missing and 1 partial ⚠️

@@           Coverage Diff           @@
##             main     #404   +/-   ##
=======================================
  Coverage   70.85%   70.85%           
=======================================
  Files         624      624           
  Lines       61196    61219   +23     
=======================================
+ Hits        43359    43376   +17     
- Misses      14690    14693    +3     
- Partials     3147     3150    +3     

Flag	Coverage Δ
unittests	70.85% <91.30%> (+<0.01%)	⬆️

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

Files with missing lines	Coverage Δ
...ules/observability/domain/metric/service/metric.go	61.71% <100.00%> (+0.28%)	⬆️
...servability/application/convertor/metric/metric.go	95.74% <89.47%> (-4.26%)	⬇️

... and 1 file with indirect coverage changes

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