Tessellation: point-in-trim tests skip runs of segments the ray canno… (#1309)

Thanks @Ian-cmd-ops.

crates/kernel/tests/tess_include_equivalence.rs

@@ -0,0 +1,16 @@
+//! Equivalence check for SolidCraft's change to the vendored tessellator's point-in-trim test.
+//!
+//! The vendored crates are outside the workspace, so their own tests never run in CI. The old
+//! test is kept behind the crate's `test-hooks` feature (on only for kernel tests) and this
+//! checks the faster one gives the same answer everywhere it is probed.
+
+use truck_meshalgo::tessellation::include_test_hooks;
+
+/// Point-in-trim with run boxes: same inside/outside answer as before on more than 100k points.
+#[test]
+fn tessellation_include_same_as_before() {
+    match include_test_hooks::include_answers_as_before(0..120) {
+        Ok(n) => assert!(n > 100_000, "only {n} points checked"),
+        Err(e) => panic!("{e}"),
+    }
+}