Wire up real implementations for Tracking & Config controllers

- TrackingController: Added database persistence for analytics events
  * Created AnalyticsEvent entity with user/session tracking
  * Store event type, data (JSON), and timestamp
  * Graceful fallback if DB write fails (game doesn't break)

- ConfigController: Added real player counting
  * Query active sessions from last 15 minutes
  * Return actual player count instead of hardcoded 0
  * Real-time server status with DB metrics

- Added AnalyticsEvents table migration
  * Stores all game telemetry for analytics
  * Indexed by UserId for performance
  * JSON event data for flexibility

Controllers now fully wired to database:
- 11/18 controllers REAL implementation ✅
- 5/18 controllers STUB (config-based) ⚠️
- 2/18 controllers SERVICE (delegated) ⚠️

Total: 95 endpoints, improving from demo to production

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

RR3CommunityServer/Controllers/ConfigController.cs

@@ -1,4 +1,6 @@
 using Microsoft.AspNetCore.Mvc;
+using Microsoft.EntityFrameworkCore;
+using RR3CommunityServer.Data;
 using RR3CommunityServer.Models;
 
 namespace RR3CommunityServer.Controllers;
@@ -7,11 +9,13 @@ namespace RR3CommunityServer.Controllers;
 [Route("config/api/android")]
 public class ConfigController : ControllerBase
 {
+    private readonly RR3DbContext _context;
     private readonly IConfiguration _configuration;
     private readonly ILogger<ConfigController> _logger;
 
-    public ConfigController(IConfiguration configuration, ILogger<ConfigController> logger)
+    public ConfigController(RR3DbContext context, IConfiguration configuration, ILogger<ConfigController> logger)
     {
+        _context = context;
         _configuration = configuration;
         _logger = logger;
     }
@@ -117,16 +121,24 @@ public class ConfigController : ControllerBase
     /// Check server status and health
     /// </summary>
     [HttpGet("getServerStatus")]
-    public ActionResult<SynergyResponse<ServerStatus>> GetServerStatus()
+    public async Task<ActionResult<SynergyResponse<ServerStatus>>> GetServerStatus()
     {
         _logger.LogInformation("GetServerStatus request");
 
+        // Get real player count from database (sessions created in last 15 minutes)
+        var fifteenMinutesAgo = DateTime.UtcNow.AddMinutes(-15);
+        var playerCount = await _context.Sessions
+            .Where(s => s.CreatedAt >= fifteenMinutesAgo)
+            .Select(s => s.UserId)
+            .Distinct()
+            .CountAsync();
+
         var status = new ServerStatus
         {
             Status = "online",
             Version = _configuration["ServerSettings:Version"] ?? "1.0.0",
             MaintenanceMode = bool.Parse(_configuration["ServerSettings:MaintenanceMode"] ?? "false"),
-            PlayerCount = 0, // TODO: Implement player counting
+            PlayerCount = playerCount,
             Uptime = Environment.TickCount64 / 1000, // Seconds since server start
             Message = _configuration["ServerSettings:MessageOfTheDay"] ?? string.Empty
         };