Addresses a review finding: cargo fmt --check was failing on the V0/L1/L2 crates (and some pre-existing engine drift). cargo fmt --all --check is now clean. No behavior change.
Move queries.rs (stored-query registry + validation) into omnigraph-queries (deps: omnigraph-config, omnigraph-compiler; no serde). Repoint crate::config -> omnigraph_config. The two catalog-projection tests (which exercise api::query_catalog_entry) are removed here and relocated to omnigraph-api-types in the next commit, where that function lives. Server aliases via 'pub use omnigraph_queries as queries;'. 16 queries tests pass; server+cli compile. No behavior change.
