[inventory] manage ssh connectivity in shared ssh.cfg usable outside of ansible with optional local overrides in ssh.cfg.local, use ssh.cfg in ansible and eliminate ssh config bleed from ~/.ssh/config, collect host key fingerprints in shared known_hosts file populated with fingerprints of reachable hosts

known_hosts

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+acmedns.hosts.hamburg.ccc.de ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIJfH16gO1ybLxz/qSwUQxfucwkkKdtaCs3LTm6mn1WBw
+auth-dns.hamburg.ccc.de ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAICot4CncMY6YA5u6T579uS1zC0OCHqmKdqC1gJLeqVzQ
+ccchoir.hosts.hamburg.ccc.de ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIK9ciwPXufyJe5GOktgR5C9wH+84xNxDwMC2/0ccEZOG
+chaosknoten.hamburg.ccc.de ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIL3OQWuF+rFishyaGnrgyG5HGVocVlewxcYR3RaBaeAw
+cloud.hosts.hamburg.ccc.de ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIA7ftSAggvJOW5WdzfocEAx5WGxrA6GgN9LozpX31R/w
+diday-staging-runner.hosts.hamburg.ccc.de ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAII3SR/4wX9dAAna7LNDbnrJdiO/GLMr3HTw1JEq8HWuI
+dooris.ccchh.net ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAII4g3VSYVjuhgA8JRRplSD7bcjmb9XfFyu5SocHCWtT3
+eh22-wiki.hosts.hamburg.ccc.de ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIIBmG79nqY//ZrSURf9EgRHZVU6YWvZVUtHnLpmXorZk
+forgejo-runner-external.hosts.hamburg.ccc.de ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAINP0sfgMZaNJEQxzDrvUdtTHE+cBRg6p4mFGuxe+C5YI
+forgejo-runner.hosts.hamburg.ccc.de ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIO/d7nDDth7U/F/ZO0Ug3S8C0rBARj77UdSCwwPVDZw3
+grafana.hosts.hamburg.ccc.de ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIGlIh+jGr3pA+M0t+LBbXswdwX1vBFcMhuhz+4KOtbC+
+jitsi.hamburg.ccc.de ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIJHQ7sD/LoHl2yiG6HsTujHGbmE72YdqXgtRDKrClqZA
+keycloak.hosts.hamburg.ccc.de ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIM4zJIin5wsYtPy6FfNBq4sWwwLAwD/YNQ8K438ePMXa
+light.ccchh.net ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIDTn7GK0USwNbONHR9gR4tc+B3iXAisNFIlmm21EUxm6
+lists.hamburg.ccc.de ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAID7fbN5/jIDd0b6KHJtOjU1u1G6iBm967dym9IegHCji
+mjolnir.hosts.hamburg.ccc.de ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIMR+2CzZC91mT9oU2BbIAqPdl1m3sp2NAKWUoU/T2MKg
+mumble.hamburg.ccc.de ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIBosJxVv02kX8vdyZfQ8lSQJnNje9id2Dk9LBDwod4ni
+netbox.hosts.hamburg.ccc.de ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIAVLtLRFHBwhbh+rGvon3KvKYuASQ878me8rgXD0ndGq
+ntfy.hosts.hamburg.ccc.de ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIGASO8ZKHX2XUUNA3sdYTEsDnCgrb6M9UeiFsyXcERM3
+onlyoffice.hosts.hamburg.ccc.de ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIBfchhdp2p7+QKoZyQHgRiv+nnGK7scytJjca9WOQgmm
+opensourcetorrents.ccchh.net ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIBLTNinzCymFZgt5Sb8pk89yfbj9MbiNENh1J0bWeyZh
+pad.hosts.hamburg.ccc.de ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAINysL9KOfnxojDyvPQnzXtHuT+UkqxyDry0vk23eIq1t
+pretalx.hosts.hamburg.ccc.de ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIInDY4enlTPVohOSBgKc+f3bCFvYvDVYeWNcbYfftYPj
+public-reverse-proxy.hamburg.ccc.de ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIIexYb1btlzHhjjLRE1hWKOEd6Zuscn8/FgG8SLUjyCh
+pve01.ccchh.net ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIEFXcy9aD0sPpi+o5zvzy4Iw5jMmNjmJK9N8IVG0mrNk
+renovate.hosts.hamburg.ccc.de ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIN5vVef1U1k3CJx1wNG3PU35+9dAG7+j4Ffu+G7tMfM+
+router.hamburg.ccc.de ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIGWM1wtkw+yVfZi2e3gRVTpjU3R8Doqlukiv1/ud6Kmv
+spaceapiccc.hosts.hamburg.ccc.de ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIMtggIp8L5i8SWM++hByCQMZJJLnliT0Ost7T4LjzcPN
+status.hamburg.ccc.de ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIIy1p5fPlmpJAVe8oO/eQjue1cBisxZhfpCizQFp1DTf
+sunders.hosts.hamburg.ccc.de ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIL10d+eTRCl/Ylzds1OvULvtQRhOd+oHqE7mxzomeyfk
+tickets.hosts.hamburg.ccc.de ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIIGVt4P0NkXVlDyOoSMYRBkGnSa433SBb3ZGKvG8ycyp
+wiki.hosts.hamburg.ccc.de ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIG9zxa16pNhD/6Mrr4hhlLowA+3PS/a87EvOA3rSTrQD
+z9-router.ccchh.net ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIISqrS1ZQIOO5t62YIHZ66kYkSNZweNfyvXF9o4Npy3X
+zammad.hosts.hamburg.ccc.de ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIJeoHcaAfZTkvzV464xFEiKhj1CLnO3tnB7A078wMw6e