Test failure: custom_appbase_tests

[heifner]

https://github.com/AntelopeIO/spring/actions/runs/14861955944/job/41729950570

  21/2107 Test    #8: custom_appbase_test ................................***Failed    0.04 sec
Running 8 test cases...
../libraries/custom_appbase/tests/custom_appbase_tests.cpp(582): error: in "custom_appbase_tests/execute_many_from_read_only_and_read_exclusive_queues": check run_on_main > 0 has failed

*** 1 failure is detected in the test module "custom_appbase_tests"

[bhazzard]

the thread checks are flaky because there is no guarantee what will run on what threads. Either remove the thread checks or do a warning instead of a failure.