feat!: switch to UUIDs

[morremeyer]

Resolves #123.

BREAKING CHANGE: Resource IDs are now UUIDs. You need to delete your
existing database before this version will start up.

[codecov]

Codecov Report

Merging #170 (f09b8fe) into main (d7a6fc9) will increase coverage by 0.01%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main     #170      +/-   ##
==========================================
+ Coverage   99.04%   99.05%   +0.01%     
==========================================
  Files          16       16              
  Lines        1147     1161      +14     
==========================================
+ Hits         1136     1150      +14     
  Misses          7        7              
  Partials        4        4              

Impacted Files	Coverage Δ
internal/httputil/request.go	100.00% <ø> (ø)
internal/models/account.go	100.00% <ø> (ø)
internal/models/transaction.go	78.57% <ø> (ø)
internal/controllers/account.go	100.00% <100.00%> (ø)
internal/controllers/allocation.go	97.77% <100.00%> (+0.05%)	⬆️
internal/controllers/budget.go	100.00% <100.00%> (ø)
internal/controllers/category.go	100.00% <100.00%> (ø)
internal/controllers/envelope.go	100.00% <100.00%> (ø)
internal/controllers/transaction.go	100.00% <100.00%> (ø)
internal/httputil/error.go	100.00% <100.00%> (ø)
... and 2 more

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