Function build_harness_mcp_config_report 

pub(crate) fn build_harness_mcp_config_report(
    harness: HarnessConfig,
    server_name: &str,
    db: &Path,
    config: Option<&Path>,
    nearest_project: bool,
) -> Result<Value, CliError>

Build a harness-specific MCP configuration document for this binary.