BroadcastClient.Agent SSH bundle (optional)

This folder is OPTIONAL and is NOT committed with private keys.

If you place an SSH private key here on the build machine, it will be bundled into
the BroadcastClient.Agent publish output under "ssh/".

Recommended file name:
- id_ed25519  (OpenSSH private key)
- id_ed25519.pub (public key, for reference)

The agent auto-detects the key when Ssh:IdentityFile is empty.

Security:
- Do NOT commit private keys to git.
- Prefer per-device keys when possible.

