Add strict mode and remove complete promise

[dfarr]

If strict mode is set to false, a promise in any state (if idempotency keys match) is returned successfully to the client, otherwise the promise must be in the same state as the request.

[codecov]

Codecov Report

Merging #73 (02e858f) into main (09f6ff0) will increase coverage by 0.97%.
The diff coverage is 76.82%.

@@            Coverage Diff             @@
##             main      #73      +/-   ##
==========================================
+ Coverage   69.82%   70.80%   +0.97%     
==========================================
  Files          42       41       -1     
  Lines        4302     4114     -188     
==========================================
- Hits         3004     2913      -91     
+ Misses       1084      990      -94     
+ Partials      214      211       -3     

Files	Coverage Δ
internal/aio/aio_dst.go	65.30% <100.00%> (+1.47%)	⬆️
internal/app/coroutines/createPromise.go	70.07% <100.00%> (+0.72%)	⬆️
internal/kernel/types/api_request.go	97.29% <100.00%> (-0.11%)	⬇️
internal/kernel/types/api_response.go	77.77% <ø> (-1.71%)	⬇️
test/dst/dst.go	93.24% <ø> (-0.27%)	⬇️
test/dst/generator.go	100.00% <100.00%> (ø)
internal/app/coroutines/cancelPromise.go	72.90% <80.00%> (ø)
internal/app/coroutines/rejectPromise.go	72.90% <80.00%> (ø)
internal/app/coroutines/resolvePromise.go	72.72% <80.00%> (ø)
test/dst/model.go	57.85% <61.90%> (+2.55%)	⬆️

... and 1 file with indirect coverage changes

📣 We’re building smart automated test selection to slash your CI/CD build times. Learn more