Trace the eye reading to FR-CULL-8a and the chip to FR-CULL-13

The register grew both clauses the same day this was built: FR-CULL-8a is
the per-face state the reading is, and FR-CULL-13 is the rule that a
signal is shown and filtered and never writes a judgement. The tags,
faces.md §17 and catalog.md now say which is which; FR-CULL-8a records
what of it is built, and that its third model is under the InsightFace
grant by the same decision as the pair.

core/dr-face/src/classify.rs

@@ -1,4 +1,4 @@
-//! TRACES: FR-CULL-13
+//! TRACES: FR-CULL-8a
 //! The two small classifiers behind a face's eye state (docs/faces.md §17).
 //!
 //! **OCEC** — *open closed eyes classification*, Hyodo 2025 — reads one