feat(ledger): add file-backed append-only Event Ledger prototype (Go) with verify

runtime/ledger/ledger_test.go

@@ -0,0 +1,18 @@
+package ledger
+
+import (
+	"os"
+	"testing"
+)
+
+func TestAppendAndVerify(t *testing.T) {
+	p := "test_ledger.jsonl"
+	os.Remove(p)
+	l, err := Open(p)
+	if err != nil { t.Fatal(err) }
+	defer os.Remove(p)
+	defer l.Close()
+	if _, err := l.Append("test_event", map[string]string{"k":"v"}); err != nil { t.Fatal(err) }
+	if _, err := l.Append("test_event2", map[string]string{"a":"b"}); err != nil { t.Fatal(err) }
+	if err := l.Verify(); err != nil { t.Fatal(err) }
+}