Set maxsize of request queue to Quantum Engine

[senecameeks]

We want to prevent overwhelming the engine tasks with too many requests.

Setting a maxsize does not reject requests that happen after the queue is full. Instead, when a request is to be put into the queue it will wait until a free slot is available before adding.

We also limit the size of the request messages sent to prevent overloading the server with very large requests.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 97.79%. Comparing base (2474d47) to head (fc4c293).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #6576   +/-   ##
=======================================
  Coverage   97.79%   97.79%           
=======================================
  Files        1124     1124           
  Lines       95658    95659    +1     
=======================================
+ Hits        93549    93550    +1     
  Misses       2109     2109           

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.