[feat][backend]: ob get trace refactor

[kidkidkid]

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[codecov]

Codecov Report

❌ Patch coverage is 97.01493% with 2 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
backend/modules/observability/infra/rpc/tag/tag.go	0.00%	1 Missing ⚠️
...ckend/modules/observability/infra/tenant/tenant.go	0.00%	1 Missing ⚠️

@@            Coverage Diff             @@
##             main     #276      +/-   ##
==========================================
+ Coverage   69.61%   69.63%   +0.01%     
==========================================
  Files         616      617       +1     
  Lines       58272    58287      +15     
==========================================
+ Hits        40567    40587      +20     
+ Misses      14722    14720       -2     
+ Partials     2983     2980       -3     

Flag	Coverage Δ
unittests	69.63% <97.01%> (+0.01%)	⬆️

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Files with missing lines	Coverage Δ
backend/modules/observability/application/trace.go	72.75% <100.00%> (+0.36%)	⬆️
...es/observability/domain/component/tenant/tenant.go	100.00% <100.00%> (ø)
...bservability/domain/trace/service/trace_service.go	83.81% <100.00%> (ø)
backend/modules/observability/infra/rpc/tag/tag.go	0.00% <0.00%> (ø)
...ckend/modules/observability/infra/tenant/tenant.go	0.00% <0.00%> (ø)

... and 4 files with indirect coverage changes

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[CozeLoop]

Aime Review: Identified 1 Must-Fix and several Should-Fix/Suggestions in concurrency and configuration handling. Please see inline comments for details.