fix(valkey): install systemd unit in proper dir; check local and git versions to avoid unnecessary recompiles

ansible_collections/nullified/infrastructure/roles/valkey/defaults/main.yml

@@ -11,8 +11,8 @@ valkey_generate_cert: true # if set to false you must override valkey_tls_{certf
 valkey_enable_unixsocket: false
 
 # TLS configuration
-valkey_tls_certfile: ~
-valkey_tls_keyfile: ~
+valkey_tls_certfile: /etc/valkey/valkey.crt
+valkey_tls_keyfile: /etc/valkey/valkey.key
 valkey_tls_keyfile_pass: ~
 
 # Connection configuration