fix(python): Fix uv install job not exiting on fail

Specifically with nmslib installation was hanging without any output, even tho library build was failed.

It can be monitored with strace or catp.

backend/windmill-worker/src/python_executor.rs

@@ -1245,7 +1245,6 @@ async fn spawn_uv_install(
                 "--target",
                 venv_p,
                 "--no-cache",
-                "-q",
             ]
         };
 
@@ -1768,10 +1767,12 @@ pub async fn handle_python_reqs(
                 }
             };
 
-            let mut stderr = uv_install_proccess
+            let mut stderr_buf = String::new();
+            let mut stderr_pipe = uv_install_proccess
                 .stderr
                 .take()
                 .ok_or(anyhow!("Cannot take stderr from uv_install_proccess"))?;
+            let stderr_future = stderr_pipe.read_to_string(&mut stderr_buf);
 
             if let Some(pid) = pids.lock().await.get_mut(i) {
                 *pid = uv_install_proccess.id();
@@ -1788,9 +1789,12 @@ pub async fn handle_python_reqs(
                     uv_install_proccess.kill().await?;
                     pids.lock().await.get_mut(i).and_then(|e| e.take());
                     return Err(anyhow::anyhow!("uv pip install was canceled"));
-                }
-                // Finished
-                exitstatus = uv_install_proccess.wait() => match exitstatus {
+                },                
+                (_, exitstatus) = async {
+                    // See tokio::process::Child::wait_with_output() for more context
+                    // Sometimes uv_install_proccess.wait() is not exiting if stderr is not awaited before it :/
+                    (stderr_future.await, uv_install_proccess.wait().await)
+                 } => match exitstatus {
                     Ok(status) => if !status.success() {
                         tracing::warn!(
                             workspace_id = %w_id,
@@ -1799,24 +1803,18 @@ pub async fn handle_python_reqs(
                             status.code()
                         );
 
-                        let mut buf = String::new();
-                        stderr.read_to_string(&mut buf).await.unwrap_or_else(|_|{
-                            buf = "Cannot read stderr to string".to_owned();
-                            0
-                        });
-
                         append_logs(
                             &job_id,
                             w_id,
                             format!(
-                                "\nError while installing {}:\n{buf}",
+                                "\nError while installing {}:\n{stderr_buf}",
                                 &req
                             ),
                             db,
                         )
                         .await;
                         pids.lock().await.get_mut(i).and_then(|e| e.take());
-                        return Err(anyhow!(buf));
+                        return Err(anyhow!(stderr_buf));
                     },
                     Err(e) => {
                         tracing::error!(