refactor(dao): improve QueryDBWithCache func and concurrent unit tests

[qwqcode]

This PR includes the following improvements:

• Changed the QueryDBWithCache function's pointer parameter passing and in-place editing to explicit function input and output passing, and errors are no longer ignored.
• Fixed concurrent unit tests, which previously had intermittent errors (caused by using different keys during concurrent test cases, expected to use the same key).
• Reviewed and ensured thread safety once again.

[codecov]

Codecov Report

Attention: Patch coverage is 71.69811% with 15 lines in your changes are missing coverage. Please review.

Project coverage is 27.19%. Comparing base (abbddfe) to head (e3c252e).

Files	Patch %	Lines
internal/cache/action.go	65.21%	5 Missing and 3 partials ⚠️
internal/dao/query_find.go	79.31%	6 Missing ⚠️
internal/dao/query_find_create.go	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #884      +/-   ##
==========================================
- Coverage   27.30%   27.19%   -0.11%     
==========================================
  Files         198      198              
  Lines        8170     8166       -4     
==========================================
- Hits         2231     2221      -10     
- Misses       5806     5811       +5     
- Partials      133      134       +1     

Flag	Coverage Δ
go	27.19% <71.69%> (-0.11%)	⬇️

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