feat: scaffold go backend foundation

internal/workflows/runner_test.go

@@ -0,0 +1,21 @@
+package workflows
+
+import (
+	"context"
+	"errors"
+	"testing"
+)
+
+func TestStubRunnerReturnsTypedNotImplemented(t *testing.T) {
+	runner := NewStubRunner()
+
+	_, err := runner.DiagnoseJobSeeker(context.Background(), DiagnosticInput{
+		UserID:     "user-1",
+		Track:      "backend-developer",
+		TargetRole: "junior-backend-developer",
+	})
+
+	if !errors.Is(err, ErrNotImplemented) {
+		t.Fatalf("err = %v, want %v", err, ErrNotImplemented)
+	}
+}