fix: SSH connection sometimes doesn't read until EOF

[BinaryMuse]

Don't stop reading from SSH session until EOF

Previously, we breaked when receiving the ExitStatus message, but per RFC 4254 §6.10, this doesn't mean all data has arrived. We now log and continue reading data until we get the actual EOF.

It's not clear to me if this affects #373 at all; I'm not able to reproduce that exact issue, but I was able to reproduce a somewhat similar one with script blocks that this does fix.

Call exec_finished when SSH command fails

This is just a failure mode that we didn't handle correctly - if the SSH command failed to run, we never called exec_finished.

[greptile-apps]

Greptile Overview

Greptile Summary

Fixed two SSH session handling issues: ensured exec_finished is called when command execution fails, and corrected RFC 4254 §6.10 compliance by continuing to read data until EOF instead of breaking early on ExitStatus.

• Added missing exec_finished call in error path when channel.exec() fails
• Removed premature loop exit on ExitStatus message to prevent data loss
• Added explanatory comment about RFC 4254 §6.10 requirement

Important Files Changed

Filename	Overview
crates/atuin-desktop-runtime/src/ssh/session.rs	Fixed missing exec_finished call on command failure and corrected RFC 4254 compliance by waiting for EOF instead of breaking on ExitStatus

[greptile-apps]

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