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)

Program.cs

@@ -16,7 +16,18 @@ var builder = WebApplication.CreateBuilder(args);
 if (RuntimeInformation.IsOSPlatform(OSPlatform.Windows))
     builder.Services.AddWindowsService();
 
-var proxyUrl = builder.Configuration["ProxyUrl"];
+var dataDir = Path.Combine(AppContext.BaseDirectory, "data");
+Directory.CreateDirectory(dataDir);
+
+var dbPath = Path.Combine(dataDir, "gott.db");
+
+// ServerSettingsService – zentrale Settings aus DB
+var serverSettings = new ServerSettingsService(dbPath);
+serverSettings.MigrateFromAppSettings(builder.Environment.ContentRootPath);
+builder.Services.AddSingleton(serverSettings);
+
+// Proxy (erfordert Neustart – wird nur beim Start gelesen)
+var proxyUrl = serverSettings.Get("ProxyUrl");
 if (!string.IsNullOrWhiteSpace(proxyUrl))
 {
     builder.Services.AddHttpClient().ConfigureHttpClientDefaults(b =>
@@ -31,10 +42,6 @@ else
     builder.Services.AddHttpClient();
 }
 
-var dataDir = Path.Combine(AppContext.BaseDirectory, "data");
-Directory.CreateDirectory(dataDir);
-
-var dbPath = Path.Combine(dataDir, "gott.db");
 var authService = new AuthService(dbPath);
 var dbService = new DatabaseService(dbPath);
 dbService.EnsureDefaultUser(authService);
@@ -50,11 +57,9 @@ builder.Services.AddSingleton(memoryService);
 builder.Services.AddSingleton(skillService);
 
 // Shared Services
-var toolService = new ToolService(builder.Configuration);
+var toolService = new ToolService(serverSettings);
 builder.Services.AddSingleton(toolService);
-var maxHistory = builder.Configuration.GetValue<int>("MaxHistory", 120);
-var reminderInterval = builder.Configuration.GetValue<int>("ReminderInterval", 30);
-var chatService = new ChatService(dbService, toolService, memoryService, skillService, maxHistory, reminderInterval);
+var chatService = new ChatService(dbService, toolService, memoryService, skillService, serverSettings);
 builder.Services.AddSingleton(chatService);
 
 // Embedding-Services (lokal, ONNX)
@@ -67,14 +72,12 @@ builder.Services.AddSingleton(embeddingBgService);
 builder.Services.AddHostedService(sp => sp.GetRequiredService<Gott.Services.EmbeddingBackgroundService>());
 
 // AnthropicService (Singleton – Token wird pro Request vom User aufgelöst)
-var payloadLogging = builder.Configuration.GetValue<bool>("PayloadLogging", false);
-var payloadLoggingGzip = builder.Configuration.GetValue<bool>("PayloadLoggingGzip", false);
 builder.Services.AddSingleton<AnthropicService>(sp =>
 {
     var svc = new AnthropicService(
         sp.GetRequiredService<IHttpClientFactory>(),
         toolService, dbService, memoryService,
-        payloadLogging, payloadLoggingGzip,
+        serverSettings,
         vectorSearch: vectorSearchService,
         embeddingBg: embeddingBgService);
     svc.SetChatService(chatService);
@@ -83,21 +86,19 @@ builder.Services.AddSingleton<AnthropicService>(sp =>
 
 // OpenAI-kompatibler Service (Nvidia etc.)
 builder.Services.AddSingleton<OpenAiService>(sp =>
-    new OpenAiService(sp.GetRequiredService<IHttpClientFactory>(), dbService, sp.GetRequiredService<ToolService>(), builder.Configuration, dataDir));
+    new OpenAiService(sp.GetRequiredService<IHttpClientFactory>(), dbService, sp.GetRequiredService<ToolService>(), serverSettings, dataDir));
 
 // Telegram Bot (pro Session – Token aus Session-Config)
-var maxIterations = builder.Configuration.GetValue<int>("MaxIterations", 100);
 builder.Services.AddSingleton<TelegramService>(sp =>
     new TelegramService(
         sp.GetRequiredService<IHttpClientFactory>(),
         dbService, chatService,
         sp.GetRequiredService<AnthropicService>(),
-        maxIterations));
+        serverSettings));
 
 // Krea Image Generation
-var kreaToken = builder.Configuration["KreaToken"] ?? "";
 builder.Services.AddSingleton(sp =>
-    new KreaService(sp.GetRequiredService<IHttpClientFactory>(), kreaToken, dataDir));
+    new KreaService(sp.GetRequiredService<IHttpClientFactory>(), serverSettings, dataDir));
 
 // Cronjob-Service (BackgroundService)
 builder.Services.AddSingleton<CronjobService>();