fix: preserve the order when migrating the playlists (#115485)

fix: preserve the order

pkg/registry/apis/dashboard/legacy/sql_dashboards.go

@@ -501,7 +501,7 @@ func (a *dashboardSqlAccess) MigratePlaylists(ctx context.Context, orgId int64,
 		return nil, err
 	}
 
-	// Group playlist items by playlist ID
+	// Group playlist items by playlist ID while preserving order
 	type playlistData struct {
 		id        int64
 		uid       string
@@ -512,7 +512,8 @@ func (a *dashboardSqlAccess) MigratePlaylists(ctx context.Context, orgId int64,
 		updatedAt int64
 	}
 
-	playlists := make(map[int64]*playlistData)
+	playlistIndex := make(map[int64]int) // maps playlist ID to index in playlists slice
+	playlists := []*playlistData{}
 	var currentID int64
 	var orgID int64
 	var uid, name, interval string
@@ -527,7 +528,8 @@ func (a *dashboardSqlAccess) MigratePlaylists(ctx context.Context, orgId int64,
 		}
 
 		// Get or create playlist entry
-		pl, exists := playlists[currentID]
+		idx, exists := playlistIndex[currentID]
+		var pl *playlistData
 		if !exists {
 			pl = &playlistData{
 				id:        currentID,
@@ -538,7 +540,10 @@ func (a *dashboardSqlAccess) MigratePlaylists(ctx context.Context, orgId int64,
 				createdAt: createdAt,
 				updatedAt: updatedAt,
 			}
-			playlists[currentID] = pl
+			playlistIndex[currentID] = len(playlists)
+			playlists = append(playlists, pl)
+		} else {
+			pl = playlists[idx]
 		}
 
 		// Add item if it exists (LEFT JOIN can return NULL for playlists without items)
@@ -554,7 +559,7 @@ func (a *dashboardSqlAccess) MigratePlaylists(ctx context.Context, orgId int64,
 		return nil, err
 	}
 
-	// Convert to K8s objects and send to stream
+	// Convert to K8s objects and send to stream (order is preserved)
 	for _, pl := range playlists {
 		playlist := &playlistv0.Playlist{
 			TypeMeta: metav1.TypeMeta{