Fix empty Storage section by configuring stdio pipes

Root cause: run_command_with_timeout() was calling cmd.spawn() without
configuring stdout/stderr pipes. This caused command output to go to
journald instead of being captured by wait_with_output(). The disk
collector received empty output and failed silently.

Solution: Configure stdout(Stdio::piped()) and stderr(Stdio::piped())
before spawning commands. This ensures wait_with_output() can properly
capture command output.

Fixes: Empty Storage section, lsblk output appearing in journald
Bump version to v0.1.222

agent/src/collectors/mod.rs

@@ -18,8 +18,13 @@ pub use error::CollectorError;
 /// Properly kills the process if timeout is exceeded
 pub async fn run_command_with_timeout(mut cmd: tokio::process::Command, timeout_secs: u64) -> std::io::Result<Output> {
     use tokio::time::timeout;
+    use std::process::Stdio;
     let timeout_duration = Duration::from_secs(timeout_secs);
 
+    // Configure stdio to capture output
+    cmd.stdout(Stdio::piped());
+    cmd.stderr(Stdio::piped());
+
     let child = cmd.spawn()?;
     let pid = child.id();