refactor: Build-Output in Build/{OS}/-Ordnerstruktur

Plattformspezifische bin/obj/publish-Ordner unter Build/Linux/
und Build/Windows/ statt bin-linux/, obj-linux/, publish/ etc.

- Directory.Build.props: OS-Erkennung setzt BaseOutputPath,
  BaseIntermediateOutputPath und MSBuildProjectExtensionsPath
  auf Build/{Linux|Windows|macOS}/
- gott.csproj: Vereinfacht auf ein einziges Build/** Exclude
- deploy.sh: publish-Output nach Build/Linux/publish
- OpenClawEndpoint.cs: DB-Pfad relativ zu AppContext.BaseDirectory
- Doku (README, ARCHITECTURE, ARCHITECTURE_QUICK) aktualisiert

Endpoints/OpenClawEndpoint.cs

@@ -17,7 +17,7 @@ namespace Gott.Endpoints;
 
 public static class OpenClawEndpoint
 {
-    private const string OpenClawDbRelativePath = "publish/data/openclaw-sessions.db";
+    private static readonly string OpenClawDbRelativePath = Path.Combine("data", "openclaw-sessions.db");
     private const string ImportTag = "openclaw-import";
 
     public static void MapOpenClawEndpoints(this IEndpointRouteBuilder app)
@@ -28,18 +28,7 @@ public static class OpenClawEndpoint
 
     private static string GetOpenClawDbPath()
     {
-        // Resolve relative to the app base directory
-        var basePath = AppContext.BaseDirectory;
-        // Navigate up from bin/Debug/net10.0 or similar to the project root
-        var candidate = Path.Combine(basePath, OpenClawDbRelativePath);
-        if (File.Exists(candidate)) return candidate;
-
-        // Try from current directory
-        candidate = Path.Combine(Directory.GetCurrentDirectory(), OpenClawDbRelativePath);
-        if (File.Exists(candidate)) return candidate;
-
-        // Try absolute common path
-        candidate = Path.Combine("/app/gott", OpenClawDbRelativePath);
+        var candidate = Path.Combine(AppContext.BaseDirectory, OpenClawDbRelativePath);
         if (File.Exists(candidate)) return candidate;
 
         return null;