fix: embedding tests broken by multi-line grep from locale stubs

Locale stubs share the same way ID as the English entry, causing grep
to return multiple score lines. The awk numeric comparison choked on
the multi-line input. Fix: head -1 to take only the highest score.

15/15 tests pass. make setup exits clean.

Author: aaronsb

tools/way-embed/test-embedding.sh

@@ -26,7 +26,7 @@ check() {
   if [[ "$should_match" == "yes" ]]; then
     if echo "$result" | grep -q "^${expected}	"; then
       local score
-      score=$(echo "$result" | grep "^${expected}	" | cut -f2)
+      score=$(echo "$result" | grep "^${expected}	" | head -1 | cut -f2)
       printf "  PASS  %-60s → %s (%s)\n" "$desc" "$expected" "$score"
       pass=$((pass + 1))
     else
@@ -38,7 +38,7 @@ check() {
   else
     # Should NOT match: check that expected way is below runtime threshold (0.35)
     local score
-    score=$(echo "$result" | grep "^${expected}	" | cut -f2 || echo "0.0000")
+    score=$(echo "$result" | grep "^${expected}	" | head -1 | cut -f2 || echo "0.0000")
     if [[ -z "$score" ]] || awk "BEGIN{exit !($score < 0.35)}" 2>/dev/null; then
       printf "  PASS  %-60s → %s correctly below threshold (%s)\n" "$desc" "$expected" "${score:-absent}"
       pass=$((pass + 1))