fix: Rework API responses

[antoinegelloz]

No description provided.

[codecov]

Codecov Report

Merging #39 (bf55d44) into main (1dc229a) will increase coverage by 0.80%.
The diff coverage is 54.81%.

@@            Coverage Diff             @@
##             main      #39      +/-   ##
==========================================
+ Coverage   59.55%   60.35%   +0.80%     
==========================================
  Files          33       31       -2     
  Lines        1083     1062      -21     
==========================================
- Hits          645      641       -4     
+ Misses        343      337       -6     
+ Partials       95       84      -11     

Impacted Files	Coverage Δ
pkg/server/health.go	100.00% <ø> (ø)
pkg/server/activation.go	43.47% <43.47%> (ø)
pkg/server/insert.go	43.75% <46.15%> (ø)
pkg/server/secret.go	57.14% <50.00%> (ø)
pkg/storage/mongo/mongo.go	62.57% <51.31%> (-5.41%)	⬇️
pkg/worker/messages/worker.go	66.66% <66.66%> (ø)
pkg/worker/retries/worker.go	65.43% <75.00%> (+2.14%)	⬆️
pkg/config.go	79.31% <100.00%> (+7.88%)	⬆️
pkg/server/delete.go	66.66% <100.00%> (ø)
pkg/server/get.go	48.83% <100.00%> (ø)
... and 2 more

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