Добавлена возможность асинхронного создания снапшотов

А также обновлены зависимости

async_test.go

@@ -0,0 +1,115 @@
+package agate
+
+import (
+	"context"
+	"os"
+	"path/filepath"
+	"testing"
+	"time"
+)
+
+func TestSnapshotAsync(t *testing.T) {
+	// Setup temporary work directory
+	workDir, err := os.MkdirTemp("", "agate_async_test")
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer os.RemoveAll(workDir)
+
+	// Initialize Agate
+	opts := AgateOptions{
+		WorkDir: workDir,
+		Logger:  nil, // Disable logging for test
+	}
+
+	ag, err := New(opts)
+	if err != nil {
+		t.Fatalf("Failed to initialize Agate: %v", err)
+	}
+	defer ag.Close()
+
+	// Get active directory and create some dummy files
+	activeDir := ag.GetActiveDir()
+	if err := os.MkdirAll(activeDir, 0755); err != nil {
+		t.Fatalf("Failed to create active dir: %v", err)
+	}
+
+	// Create a large-ish file to ensure it takes some time (though still fast)
+	dummyFile := filepath.Join(activeDir, "data.bin")
+	data := make([]byte, 1024*1024) // 1MB
+	if err := os.WriteFile(dummyFile, data, 0644); err != nil {
+		t.Fatalf("Failed to create dummy file: %v", err)
+	}
+
+	// Start async snapshot
+	ctx := context.Background()
+	snapshotID, err := ag.SnapshotAsync(ctx, "async-snap", "")
+	if err != nil {
+		t.Fatalf("SnapshotAsync failed: %v", err)
+	}
+
+	if snapshotID == "" {
+		t.Fatal("SnapshotAsync returned empty ID")
+	}
+
+	// Check status immediately
+	status, err := ag.GetSnapshotStatus(ctx, snapshotID)
+	if err != nil {
+		t.Fatalf("GetSnapshotStatus failed: %v", err)
+	}
+
+	// Status should be pending or running
+	if status.Status != "pending" && status.Status != "running" {
+		t.Errorf("Initial status should be pending or running, got: %s", status.Status)
+	}
+
+	// Poll for completion
+	timeout := time.After(5 * time.Second)
+	ticker := time.NewTicker(10 * time.Millisecond)
+	defer ticker.Stop()
+
+	done := false
+	for !done {
+		select {
+		case <-timeout:
+			t.Fatal("Timeout waiting for snapshot completion")
+		case <-ticker.C:
+			status, err := ag.GetSnapshotStatus(ctx, snapshotID)
+			if err != nil {
+				t.Fatalf("GetSnapshotStatus failed during polling: %v", err)
+			}
+
+			if status.Status == "done" {
+				done = true
+				if status.Progress != 1.0 {
+					t.Errorf("Expected progress 1.0, got %f", status.Progress)
+				}
+			} else if status.Status == "failed" {
+				t.Fatalf("Snapshot creation failed: %s", status.Error)
+			}
+		}
+	}
+
+	// Verify snapshot exists
+	snaps, err := ag.ListSnapshots(ctx)
+	if err != nil {
+		t.Fatalf("ListSnapshots failed: %v", err)
+	}
+
+	found := false
+	for _, s := range snaps {
+		if s.ID == snapshotID {
+			found = true
+			break
+		}
+	}
+
+	if !found {
+		t.Errorf("Snapshot %s not found in list", snapshotID)
+	}
+
+	// Verify current snapshot ID is updated
+	if ag.GetCurrentSnapshotID() != snapshotID {
+		t.Errorf("Current snapshot ID not updated. Expected %s, got %s", snapshotID, ag.GetCurrentSnapshotID())
+	}
+}