Failed session request should add reason/detail

[nphilipp]

<Zhenech> can't reserve nodes: quantity=1 pool='metal-ec2-c5n-centos-8s-x86_64'
<arrfab> pool=<name>,quantity=<number> ?
<Zhenech> that's ansible pretty output
<Zhenech> the request was "correct" (as in it always worked before)
<Zhenech> new run succeeded :shrug:
<arrfab> probably not enough machines in ready state in that pool ?
<Zhenech> maybe. right now it shows 2 ready, but no idea what was during the request
<Zhenech> (duffy[client] doesnt check that itself, right?)
<arrfab> Zhenech: if you use show-pool <pool_name>
* mrc0mmand has quit (*.net *.split)
<Zhenech> sure, but why would I? I say (in ansible, but that are details) "duffy client request-session" and that returns me "DuffyApiErrorDetailModel(detail=\"can't reserve nodes: quantity=1 pool='metal-ec2-c5n-centos-8s-x86_64'\")" which is, not a lot of detail ;)
<Zhenech> should I RFE a "reason" in the error?
<arrfab> Zhenech: why not ? :-) ... nils can have a look at this if he has free time :-p