feat: allow dynamic ack deadline

[lucasoares]

Fixes #39

[codecov]

Codecov Report

Merging #41 (6973e13) into main (96c0cfd) will increase coverage by 0.03%.
Report is 2 commits behind head on main.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main      #41      +/-   ##
==========================================
+ Coverage   82.08%   82.11%   +0.03%     
==========================================
  Files          26       26              
  Lines        3689     3696       +7     
==========================================
+ Hits         3028     3035       +7     
  Misses        519      519              
  Partials      142      142              

Files Changed	Coverage Δ
internal/queue/cache/cache.go	0.00% <ø> (ø)
internal/queue/cache/memory_cache.go	89.61% <100.00%> (+0.09%)	⬆️
internal/queue/cache/redis_cache.go	89.35% <100.00%> (+0.11%)	⬆️
internal/queue/queue.go	91.43% <100.00%> (ø)
internal/service/deckard_service.go	79.27% <100.00%> (ø)