fix: avoid data races when deleting in background

[dundee]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 75.00000% with 6 lines in your changes are missing coverage. Please review.

Project coverage is 90.28%. Comparing base (755b20d) to head (04d9269).

Files	Patch %	Lines
pkg/analyze/file.go	75.00%	4 Missing ⚠️
pkg/analyze/stored.go	0.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #338      +/-   ##
==========================================
- Coverage   90.39%   90.28%   -0.11%     
==========================================
  Files          34       34              
  Lines        3653     3675      +22     
==========================================
+ Hits         3302     3318      +16     
- Misses        283      289       +6     
  Partials       68       68              

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