feat: add persisted page insight platform

internal/insight/model_test.go

@@ -0,0 +1,22 @@
+package insight
+
+import "testing"
+
+func TestParseModuleRejectsUnscopedValues(t *testing.T) {
+	for _, value := range []string{"overview", "payments", "fees", "peers", "transactions", "growth"} {
+		if _, ok := ParseModule(value); !ok {
+			t.Fatalf("expected %s to be valid", value)
+		}
+	}
+	for _, value := range []string{"", "transaction-detail", "merchant_2", "OVERVIEW"} {
+		if _, ok := ParseModule(value); ok {
+			t.Fatalf("expected %s to be invalid", value)
+		}
+	}
+}
+
+func TestStaleAlwaysCapsConfidence(t *testing.T) {
+	if got := confidenceFor(FreshnessStale); got != ConfidenceLow {
+		t.Fatalf("got %s", got)
+	}
+}