//! Format-validity helpers for the CLI integration suite.
//!
//! Submodule `validators` carries the same three helpers as
//! `tests/common/validators.rs` in the lib crate (validate_sarif,
//! assert_checkstyle_well_formed_and_structural, assert_html_well_formed).
//! Cargo `[dev-dependencies]` and shared modules do not propagate
//! across workspace members, so the duplication is unavoidable
//! without a separate test-helpers crate. Three small helpers don't
//! merit that indirection today.