mooncake fleet observe memory

Observe memory + swap across peers

Flags

Flag	Type	Default	Description
--peer	[]string	-	Select peers: repeat to UNION. Each value is a name, key=value filter (tag=production), or @k=v,k2=v2 AND-group. Default: every peer in peers.toml.
--peers-file	string	-	Override the peers.toml path
--parallel	int	0	Max peers in flight (0 = unbounded)
--format	string	table	Output format: table (default) or json