Switch to UUID

[hlcfan]

Very hacky change from integer keys to uuid.

• SQL to change schema
  • Add uuid columns
  • Populate uuid columns
  • Swap id column with uuid column
  • Change primary key
  • Remove uid
  • Add index to new uuid columns
• Code changes from uid to id

[codecov]

Codecov Report

Merging #301 (f972c3f) into master (4fb7871) will decrease coverage by 0.00%.
The diff coverage is 100.00%.

❗ Current head f972c3f differs from pull request most recent head 6e884ad. Consider uploading reports for the commit 6e884ad to get more accurate results

@@            Coverage Diff             @@
##           master     #301      +/-   ##
==========================================
- Coverage   99.62%   99.61%   -0.01%     
==========================================
  Files          75       69       -6     
  Lines        2646     2584      -62     
==========================================
- Hits         2636     2574      -62     
  Misses         10       10              

Impacted Files	Coverage Δ
app/models/authorization.rb	100.00% <ø> (ø)
app/models/scheme.rb	100.00% <ø> (ø)
app/models/story.rb	100.00% <ø> (ø)
app/models/user_room.rb	100.00% <ø> (ø)
app/presenters/user_presenter.rb	100.00% <ø> (ø)
app/controllers/rooms_controller.rb	100.00% <100.00%> (ø)
app/models/room.rb	100.00% <100.00%> (ø)
app/models/user_story_point.rb	100.00% <100.00%> (ø)
app/repositories/room_repository.rb	100.00% <100.00%> (ø)
spec/controllers/rooms_controller_spec.rb	100.00% <100.00%> (ø)
... and 26 more

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