feat: expose deal ID as replica ID

[rvagg]

Closes: #216

If we want to take the approach of adding uniqueness by exposing the deal ID, which is unique in the Singularity database but increments with each deal. Are there concerns with exposing this number? Does it leak anything interesting if you have a multi-user system? Perhaps multi-user is something that's handled downstream and can be filtered out if necessary?

[codecov-commenter]

Codecov Report

Merging #217 (401d368) into main (63ceec3) will increase coverage by 7.16%.
Report is 9 commits behind head on main.
The diff coverage is 0.00%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #217      +/-   ##
==========================================
+ Coverage   31.66%   38.82%   +7.16%     
==========================================
  Files           5        6       +1     
  Lines         777      904     +127     
==========================================
+ Hits          246      351     +105     
- Misses        494      507      +13     
- Partials       37       46       +9     

Files	Coverage Δ
blob/blob.go	37.50% <ø> (ø)
integration/singularity/store.go	35.87% <0.00%> (-0.66%)	⬇️

... and 4 files with indirect coverage changes