Refactor: Server-Settings von appsettings.json in DB-Tabelle (server_settings)

- Neuer ServerSettingsService: zentrale Settings in SQLite mit In-Memory-Cache
- Auto-Migration: bestehende appsettings.Production.json wird einmalig in DB übernommen
- Alle Services umgestellt: IConfiguration → ServerSettingsService (dynamisch, kein Neustart)
- Port bleibt als einziges Setting in appsettings.Production.json (erfordert Neustart)
- ServerSettingsEndpoint: liest/schreibt DB statt JSON-Datei, Port als Sonder-Setting
- IConfiguration komplett entfernt aus allen Services (ChatService, ToolService, AnthropicService,
  OpenAiService, KreaService, TelegramService, KeyScannerService, GitHubEventScannerService)
- AuthMiddleware: KreaApiKey dynamisch aus DB
- appsettings.json bereinigt: nur noch Port und Logging
- Dokumentation aktualisiert (ARCHITECTURE.md, ARCHITECTURE_QUICK.md, README.md)

Services/AnthropicService.cs

@@ -19,21 +19,19 @@ public class AnthropicService
     private readonly ToolService _toolService;
     private readonly DatabaseService _db;
     private readonly MemoryService _memoryService;
-    private readonly bool _payloadLogging;
-    private readonly bool _payloadLoggingGzip;
+    private readonly ServerSettingsService _settings;
     private readonly VectorSearchService _vectorSearch;
     private readonly EmbeddingBackgroundService _embeddingBg;
     private ChatService _chatService;
     private TelegramService _telegramService;
 
-    public AnthropicService(IHttpClientFactory httpFactory, ToolService toolService, DatabaseService db, MemoryService memoryService = null, bool payloadLogging = false, bool payloadLoggingGzip = false, VectorSearchService vectorSearch = null, EmbeddingBackgroundService embeddingBg = null)
+    public AnthropicService(IHttpClientFactory httpFactory, ToolService toolService, DatabaseService db, MemoryService memoryService = null, ServerSettingsService settings = null, VectorSearchService vectorSearch = null, EmbeddingBackgroundService embeddingBg = null)
     {
         _httpFactory = httpFactory;
         _toolService = toolService;
         _db = db;
         _memoryService = memoryService;
-        _payloadLogging = payloadLogging;
-        _payloadLoggingGzip = payloadLoggingGzip;
+        _settings = settings;
         _vectorSearch = vectorSearch;
         _embeddingBg = embeddingBg;
     }
@@ -1201,7 +1199,7 @@ public class AnthropicService
 
     private void LogPayload(string json, string sessionId, string chainId, int iteration)
     {
-        if (!_payloadLogging) return;
+        if (_settings == null || !_settings.GetBool("PayloadLogging", false)) return;
         try
         {
             var logsDir = Path.Combine(AppContext.BaseDirectory, "data", "logs");
@@ -1209,7 +1207,7 @@ public class AnthropicService
             var timestamp = DateTimeOffset.UtcNow.ToUnixTimeSeconds();
             var baseName = $"{timestamp}-{sessionId}-{chainId}-iter{iteration}-payload";
 
-            if (_payloadLoggingGzip)
+            if (_settings?.GetBool("PayloadLoggingGzip", false) ?? false)
             {
                 var filePath = Path.Combine(logsDir, baseName + ".json.gz");
                 using var fs = File.Create(filePath);