Expose build identity in version output

src/bin/dosh-server.rs

@@ -51,7 +51,11 @@ static AGENT_SOCK_COUNTER: AtomicU64 = AtomicU64::new(0);
 const NATIVE_HANDSHAKE_TTL_SECS: u64 = 30;
 
 #[derive(Debug, Parser)]
-#[command(name = "dosh-server")]
+#[command(
+    name = "dosh-server",
+    version = dosh::build_info::VERSION,
+    long_version = dosh::build_info::LONG_VERSION
+)]
 struct Args {
     #[command(subcommand)]
     command: Command,