[repo test] Avoid hangs in zmq repo unit test
- interaction through the zmq event loop from a different thread is only
allowed through add_callback
- notify the background thread when the client dies with an exception so it
doesn't spin forever
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.*/data/database/.*\.sqlite
.*/data/database/.*\.config
.*/data/database/tmpdb.*
.*/data/ldapdb/.*
^doc/html/
^doc/doctrees/
^doc/book/en/devweb/js_api/