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.

ui/dr-ui/ui/library.slint

@@ -1509,7 +1509,7 @@ export component LibraryGrid inherits Rectangle {
     in property <bool> filter-people-all: false;
     callback filter-person-cleared(int);
     callback filter-people-mode-toggled();
-    /// TRACES: FR-CULL-13
+    /// TRACES: FR-CULL-8a | FR-CULL-13
     /// Only photographs in which the chosen people are not blinking. Shown
     /// and meaningful only while `filter-people` holds someone.
     in property <bool> filter-eyes-open: false;