fix: rebuild MES as compilable go-zero+ent backend (renamed bj_power_mes), restore 3 workstation projects from pristine original, align naming; all Go projects go build clean

bj_power_mes/internal/mock/marking.go

@@ -0,0 +1,28 @@
+package mock
+
+import (
+	"context"
+	"time"
+)
+
+// MockMarking implements marking.MarkingInterface with simulated marking.
+type MockMarking struct {
+	delay time.Duration
+}
+
+// NewMockMarking creates a MockMarking with default 500ms delay.
+func NewMockMarking() *MockMarking {
+	return &MockMarking{
+		delay: 500 * time.Millisecond,
+	}
+}
+
+// Mark simulates laser marking with a delay.
+func (m *MockMarking) Mark(ctx context.Context, text string) error {
+	select {
+	case <-time.After(m.delay):
+		return nil
+	case <-ctx.Done():
+		return ctx.Err()
+	}
+}