Websocket: Set max incoming payload size

Currently most servers have a stanza size limit around 256 - 512 kb
2 jobs for master in 27 seconds (queued for 5 seconds)
Status Name Job ID Coverage
  Test
failed run-test #23886

00:00:27

 
  Build
skipped run-build #23887
 
Name Stage Failure
failed
run-test Test
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Cleaning up project directory and file based variables
ERROR: Job failed: exit code 1