[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

ansible.cfg

@@ -5,3 +5,6 @@ vars_plugins_enabled = host_group_vars,community.sops.sops
 collections_path = ./
 roles_path = ./galaxy-roles
 interpreter_python = python3
+
+[ssh_connection]
+ssh_args = -F ssh.cfg -o StrictHostKeyChecking=accept-new -o UserKnownHostsFile=known_hosts