Moved to uv from poetry

Updated ruff and mypy, accepted all changes
Central exception management and injected the Session.
This removed a lot of duplicated boilerplate code.
Added health check
Updated to Angular 21

overlord/tsconfig.app.json

@@ -5,6 +5,6 @@
     "outDir": "../frontend",
     "types": []
   },
-  "files": ["src/main.ts"],
-  "include": ["src/**/*.d.ts"]
+  "include": ["src/**/*.ts"],
+  "exclude": ["src/**/*.spec.ts"]
 }