fix(server): ensure selfhost admin created after all data migrated

[forehalo]

fix #6154

cp to canary

[nx-cloud]

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✅ Successfully ran 6 targets

• nx test:coverage @affine/monorepo
• nx build @affine/native -- --target x86_64-pc-windows-msvc --use-napi-cross
• nx build @affine/storage -- --target x86_64-unknown-linux-gnu --use-napi-cross
• nx build @affine/native -- --target x86_64-apple-darwin --use-napi-cross
• nx build @affine/native -- --target aarch64-apple-darwin --use-napi-cross
• nx build @affine/native -- --target x86_64-unknown-linux-gnu --use-napi-cross

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 60.86%. Comparing base (d82ee7d) to head (98ef39b).

Additional details and impacted files

@@           Coverage Diff           @@
##             beta    #6163   +/-   ##
=======================================
  Coverage   60.86%   60.86%           
=======================================
  Files         501      501           
  Lines       22797    22797           
  Branches     2021     2021           
=======================================
  Hits        13875    13875           
  Misses       8693     8693           
  Partials      229      229           

Flag	Coverage Δ
server-test	70.51% <ø> (ø)
unittest	39.62% <ø> (ø)

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