lib.ec.ssh.Paramiko: Avoid recv deadlock

_run_ssh() waits for the remote process's exit status before reading
stdout and stderr. When a command produces more output than the
channel's flow-control window can hold, the server stops sending, the
remote process blocks on its write and never exits, and
recv_exit_status() blocks forever.

Drain stdout and stderr to EOF first - the channels close when the
process exits, so reading them also implies completion - and only
then query the exit status.

Assisted-by: unsloth/Qwen3.8-27B-GGUF:Q4_K_M with pi.dev v0.84.2
Signed-off-by: Jan Lindemann <jan@janware.com>

src/python/jw/pkg/lib/ec/ssh/Paramiko.py

@@ -95,5 +95,7 @@ class Paramiko(Base):
         if cmd_input is not None:
             stdin.write(cmd_input)
         stdin.channel.shutdown_write()
+        stdout_data = stdout.read()
+        stderr_data = stderr.read()
         exit_status = stdout.channel.recv_exit_status()
-        return Result(stdout.read(), stderr.read(), exit_status, cmd = cmd)
+        return Result(stdout_data, stderr_data, exit_status, cmd = cmd)