Use provided database Engine

[Gusted]

• Don't get the engine from db.DefaultContext, instead use the
  provided one which is passed as paramater e.

[codecov-commenter]

Codecov Report

Merging #17595 (1f2d878) into main (021df29) will decrease coverage by 0.02%.
The diff coverage is 50.00%.

@@            Coverage Diff             @@
##             main   #17595      +/-   ##
==========================================
- Coverage   45.52%   45.49%   -0.03%     
==========================================
  Files         793      793              
  Lines       88854    88854              
==========================================
- Hits        40447    40425      -22     
- Misses      41896    41913      +17     
- Partials     6511     6516       +5     

Impacted Files	Coverage Δ
models/user.go	55.55% <0.00%> (ø)
models/org.go	76.90% <100.00%> (ø)
modules/queue/workerpool.go	48.09% <0.00%> (-3.06%)	⬇️
modules/notification/mail/mail.go	35.29% <0.00%> (-2.95%)	⬇️
modules/log/file.go	73.60% <0.00%> (-1.61%)	⬇️
modules/notification/ui/ui.go	60.86% <0.00%> (-1.45%)	⬇️
models/notification.go	65.28% <0.00%> (-0.88%)	⬇️
models/repo_list.go	78.43% <0.00%> (-0.79%)	⬇️
models/issue_comment.go	51.31% <0.00%> (-0.30%)	⬇️
modules/queue/queue_channel.go	96.66% <0.00%> (+1.66%)	⬆️

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[zeripath]

make lgtm work