[api] add (disabled) test route for crash/errbit setup testing
[dist] sphinx db keeps becoming incompatible

it feels like every second update we run into crashes due to that.

So lets always wipe it, the re-creation time is short enough
[backend] write a line when send binary release tracking event in logfile
[api] fix "not()" operator in xpath queries

also adding search support for obsolete time
[ci] cleanup
[api] fix obsolete_time for new binary_release items