VPS credential leaks in /tmp from previous sessions.

VPS credential leaks in /tmp from previous sessions. Found /tmp/fivetran-mcp-env-backup (API keys), /tmp/sshd_config.bak, /tmp/sshd_config.new in world-readable /tmp. Also 40+ stale analysis artifacts. Rule: After any env backup operation, delete the backup file immediately once live service is verified. Never leave credentials in /tmp.