Connect OpenClaw to my on-prem Nessie deployment using its native remote MCP support.

MCP endpoint: {{NESSIE_MCP_URL}}

1. Inspect OpenClaw's active configuration and preserve unrelated settings. Configure mcp.servers.nessie with transport "streamable-http" and the exact MCP endpoint above.
2. Ask me to enter my Nessie account API key in a private terminal, never in this chat. Set the server's Authorization header to Bearer followed by that key, preserving the configuration file's private permissions.
3. Do not run `openclaw nessie init` or `openclaw nessie status`: those plugin commands currently hard-code the cloud endpoint.
4. Remind me to quit and reopen OpenClaw. Verify through the configured MCP connection that I can browse this deployment's integrations and search a known document. Report any connection or authorization failure without changing the endpoint.
