feat: Add TeleBot session tracking to LittleShop and fix live activity feed ordering

- Add LittleShopSessionId and MessageCount properties to UserSession model
- Integrate SessionManager with BotManagerService for remote session tracking
- Wire up SessionManager.SetBotManagerService() at startup in Program.cs
- Create remote sessions via BotManagerService.StartSessionAsync() when users connect
- Update remote sessions periodically (every 10 messages) via UpdateSessionAsync()
- Fix live activity feed to show newest records at top by reversing array iteration

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

LittleShop/Areas/Admin/Views/BotActivity/LiveView.cshtml

@@ -228,7 +228,8 @@
             $.get('@Url.Action("GetRecentActivities")', { count: 30 }, function(activities) {
                 const feed = $('#activityFeed');
 
-                activities.forEach(function(activity) {
+                // Reverse so oldest is prepended first, newest ends up at top
+                activities.slice().reverse().forEach(function(activity) {
                     const existingItem = $(`#activity-${activity.id}`);
                     if (existingItem.length === 0) {
                         const isNew = lastActivityId && activity.id !== lastActivityId;