feat(analyzer): update MQTT handler, active trade monitoring, and dynamic settings

FinlyticAnalyzer/Services/ActiveTradeMonitorWorker.cs

@@ -211,8 +211,8 @@ public class ActiveTradeMonitorWorker : BackgroundService
             },
             MarketContext = new MarketContextInfo
             {
-                Vix = (double)vixService.CurrentVix,
-                MarketRegime = vixService.CurrentRegime.ToString()
+                Vix = vixService.GetCurrentVix(),
+                MarketRegime = vixService.GetCurrentRegime().ToString()
             },
             UserPreferences = new UserPreferencesInfo
             {

FinlyticAnalyzer/Services/N8nEvaluationService.cs

@@ -14,7 +14,11 @@ public class N8nEvaluationService : IN8nEvaluationService
     {
         _httpClient = httpClient;
         _logger = logger;
-        _webhookUrl = configuration["N8N:WebhookUrl"] ?? configuration["N8N__WebhookUrl"] ?? "https://n8n.kleidukos.me/webhook/gemini/analysis/auto";
+        _webhookUrl = configuration["N8N:WebhookUrl"] ?? configuration["N8N__WebhookUrl"] ?? string.Empty;
+        if (string.IsNullOrWhiteSpace(_webhookUrl))
+        {
+            _logger.LogWarning("[{Channel}] N8N:WebhookUrl configuration is missing or empty.", "AnalyzerChannel");
+        }
         
         // Timeout auf 45 Sekunden erhöht für komplexere LLM/Gemini Chains in n8n
         _httpClient.Timeout = TimeSpan.FromSeconds(45);
@@ -25,6 +29,12 @@ public class N8nEvaluationService : IN8nEvaluationService
     /// </summary>
     public async Task<N8nAnalysisResponseDto?> EvaluateAssetAsync(N8nAnalysisRequestDto request, CancellationToken cancellationToken = default)
     {
+        if (string.IsNullOrWhiteSpace(_webhookUrl))
+        {
+            _logger.LogError("[{Channel}] Cannot execute AI evaluation for {Symbol}: N8N:WebhookUrl is not configured.", "AnalyzerChannel", request.TargetAsset.Symbol);
+            return null;
+        }
+
         try
         {
             _logger.LogInformation("[{Channel}] Sending n8n AI Evaluation request {RequestId} for Asset {Symbol} (ISIN: {Isin}) to {Url}...",