Repoint CLI imports to the extracted crates: api DTOs -> omnigraph-api-types, QueryRegistry/check -> omnigraph-queries, config types -> omnigraph-config, and Policy* -> omnigraph-policy directly (no longer via the server re-export shim). Remove omnigraph-server from the CLI manifest. The CLI no longer pulls Axum/tower/utoipa-axum: 'cargo tree -p omnigraph-cli -i omnigraph-server' and '-i axum' both report not-in-graph. No behavior change (CLI compiles; no test churn — CLI tests import none of the moved symbols).
