refactor: split modules and harden scraping workflows

internal/service/scraper_test_helpers_test.go

@@ -0,0 +1,26 @@
+package service
+
+func firstIndexFunc(values []string, match func(string) bool) int {
+	for i, value := range values {
+		if match(value) {
+			return i
+		}
+	}
+	return -1
+}
+
+func firstQuery(values []string) string {
+	if len(values) == 0 {
+		return ""
+	}
+	return values[0]
+}
+
+func lastIndexFunc(values []string, match func(string) bool) int {
+	for i := len(values) - 1; i >= 0; i-- {
+		if match(values[i]) {
+			return i
+		}
+	}
+	return -1
+}