Use unique ssh-agent socket path

[AgentGoose32]

Summary

• uses a per-run ssh-agent socket path under RUNNER_TEMP instead of the fixed /tmp/ssh-auth.sock
• includes the current process id in the socket filename to avoid collisions on self-hosted runners
• rebuilds the bundled action output

This prevents repeated or concurrent action runs on the same runner from failing with unix_listener: cannot bind to path /tmp/ssh-auth.sock: Address already in use.

Validation

• npm run typecheck
• npm run build
• git diff --check

Fixes #22