Update migrations for new migration flow

[mappum]

This PR updates the migration implementations for recent changes in orga.

[codecov-commenter]

Codecov Report

Merging #167 (e3965b5) into develop (8224a74) will decrease coverage by 0.12%.
The diff coverage is 0.33%.

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@@             Coverage Diff             @@
##           develop     #167      +/-   ##
===========================================
- Coverage    10.42%   10.30%   -0.12%     
===========================================
  Files           22       22              
  Lines         4604     4657      +53     
===========================================
  Hits           480      480              
- Misses        4124     4177      +53     

Impacted Files	Coverage Δ
src/airdrop.rs	38.74% <0.00%> (ø)
src/app.rs	0.00% <0.00%> (ø)
src/app/migrations.rs	0.00% <0.00%> (ø)
src/bin/nomic.rs	0.00% <0.00%> (ø)
src/bitcoin/adapter.rs	46.77% <ø> (+2.15%)	⬆️
src/bitcoin/checkpoint.rs	0.00% <0.00%> (ø)
src/bitcoin/mod.rs	0.00% <0.00%> (ø)
src/bitcoin/signatory.rs	0.00% <ø> (ø)
src/bitcoin/threshold_sig.rs	0.00% <0.00%> (ø)
src/lib.rs	0.00% <ø> (ø)
... and 1 more

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