feat: split checkpoint db

[Yisaer]

No description provided.

[codecov]

Codecov Report

❌ Patch coverage is 61.36364% with 17 lines in your changes missing coverage. Please review.
✅ Project coverage is 71.42%. Comparing base (8a59ad3) to head (da27418).
⚠️ Report is 6 commits behind head on master.

Files with missing lines	Patch %	Lines
internal/server/server.go	60.00%	6 Missing and 2 partials ⚠️
internal/pkg/store/setup.go	64.71%	3 Missing and 3 partials ⚠️
internal/pkg/store/stores.go	57.14%	2 Missing and 1 partial ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #3909   +/-   ##
=======================================
  Coverage   71.42%   71.42%           
=======================================
  Files         453      453           
  Lines       51923    51962   +39     
=======================================
+ Hits        37082    37111   +29     
- Misses      11942    11947    +5     
- Partials     2899     2904    +5     

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