Summary

• Configure Backend.AI auto-detected clusters to use /home/config/ssh/id_cluster as the SSH key
• Update from_backendai_env() function to set the correct SSH key path in cluster defaults
• Add tests to verify the SSH key configuration for Backend.AI environments

Changes

• Modified src/config.rs: Set SSH key to /home/config/ssh/id_cluster when creating clusters from Backend.AI environment variables
• Updated tests/backendai_env_test.rs: Added assertions to verify the SSH key is correctly configured

Context

When bssh auto-detects a Backend.AI cluster environment through BACKENDAI_CLUSTER_* environment variables, it now uses the standard Backend.AI cluster SSH key location (/home/config/ssh/id_cluster) instead of default user SSH keys.

This ensures proper authentication in Backend.AI multi-node cluster environments where the cluster-specific key is required.