function main returns exit status

[Keksoj]

Now the error of the main function is not only logged, but also the exit status is 1:

$ sozu -c sozu.toml metrics get -t 1                                                 12:18
Logs will be sent to stdout
Access logs will be sent to Some("stdout")
2024-08-09T10:19:22.023544Z 1723198762023544205 39111 DEBUG CTL	sozu::ctl	applying timeout 1ms
2024-08-09T10:19:22.023571Z 1723198762023571406 39111 DEBUG CTL	sozu::ctl	Executing command Metrics { cmd: Get { list: false, refresh: None, names: [], clusters: [], backends: [], no_clusters: false, workers: false } }
2024-08-09T10:19:22.024556Z 1723198762024556744 39111 DEBUG CTL	sozu::ctl::command	Processing: Querrying metrics...

could not read message on a blocking channel: Timeout is reached: 1ms

Error: Cli(ReadBlocking(TimeoutReached(1ms)))

$ echo $?
1