Feat/support db transaction

[hunjixin]

No description provided.

[codecov]

Codecov Report

Merging #29 (4630c36) into main (4435658) will increase coverage by 0.04%.
Report is 1 commits behind head on main.
The diff coverage is 62.50%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #29      +/-   ##
==========================================
+ Coverage   44.56%   44.61%   +0.04%     
==========================================
  Files          54       55       +1     
  Lines        6822     6848      +26     
==========================================
+ Hits         3040     3055      +15     
- Misses       3434     3444      +10     
- Partials      348      349       +1     

Files	Coverage Δ
models/object.go	44.59% <100.00%> (ø)
models/ref.go	59.09% <100.00%> (ø)
models/repository.go	59.09% <100.00%> (ø)
models/user.go	78.04% <100.00%> (ø)
versionmgr/tree.go	69.41% <100.00%> (ø)
models/wip.go	0.00% <0.00%> (ø)
models/repo.go	57.69% <57.69%> (ø)