fix(verify): 7a loader stem regex allows digits (gp2_loader)

scripts/factory_verify_landing.sh

@@ -92,7 +92,7 @@ CRATE_DIR="$CRATE"
 if [ "$LANG_" = "rust" ]; then
     # 7a: loader exists — discovered from the facade's own import (loader
     # naming uses abbreviated stems: subsystem_health -> sh_loader).
-    LOADER_REF=$(grep -oE "[a-z]+_loader" "$FACADE" 2>/dev/null | head -1)
+    LOADER_REF=$(grep -oE "[a-z0-9]+_loader" "$FACADE" 2>/dev/null | head -1)
     if [ -n "$LOADER_REF" ] && [ -f "src/rune/${LOADER_REF}.py" ]; then
         check "PASS" "7a loader exists: src/rune/${LOADER_REF}.py (per facade import)"
     elif [ -f "$FACADE" ] && ! grep -qE "import.*_loader|from.*_loader" "$FACADE"; then