feat: publish standalone worker

Separate worker packaging and service lifecycle from the control plane.

internal/workercluster/testhelpers_test.go

@@ -0,0 +1,56 @@
+package workercluster
+
+import (
+	"bytes"
+	"encoding/json"
+	"testing"
+)
+
+// jsonMarshal marshals v to JSON or fails the test.
+func jsonMarshal(v interface{}) ([]byte, error) {
+	return json.Marshal(v)
+}
+
+// bytesBuffer is a minimal in-memory raft.SnapshotSink that captures
+// the bytes written to it. Used by snapshot Persist() in tests.
+type bytesBuffer struct {
+	bytes.Buffer
+}
+
+func (b *bytesBuffer) Close() error  { return nil }
+func (b *bytesBuffer) Cancel() error { return nil }
+func (b *bytesBuffer) ID() string    { return "test-snapshot" }
+
+// mustEntry encodes an Entry struct with the given field values into
+// JSON. It exists so the test bodies stay readable. All payload fields
+// are []byte; pass nil to leave them unset.
+func mustEntry(
+	t *testing.T,
+	typ EntryType,
+	setJSON, memberJSON, observeJSON, adoptedJSON, configJSON, stateJSON, outboxJSON []byte,
+) []byte {
+	t.Helper()
+
+	entry := Entry{
+		Type:    typ,
+		Set:     rawOrEmpty(setJSON),
+		Member:  rawOrEmpty(memberJSON),
+		Observe: rawOrEmpty(observeJSON),
+		Adopted: rawOrEmpty(adoptedJSON),
+		Report:  rawOrEmpty(configJSON),
+		State:   rawOrEmpty(stateJSON),
+		Outbox:  rawOrEmpty(outboxJSON),
+	}
+	raw, err := json.Marshal(entry)
+	if err != nil {
+		t.Fatalf("encode entry: %v", err)
+	}
+	return raw
+}
+
+func rawOrEmpty(b []byte) json.RawMessage {
+	if len(b) == 0 {
+		return nil
+	}
+	return json.RawMessage(b)
+}