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/src/app/recipe/recipe-list/recipe-list.component.ts

@@ -11,9 +11,9 @@ import { MatSort, MatSortModule } from '@angular/material/sort';
 import { MatTableModule } from '@angular/material/table';
 import { ActivatedRoute, Router, RouterModule } from '@angular/router';
 import { BehaviorSubject } from 'rxjs';
-import { Period } from 'src/app/period/period';
 
 import { ProductGroup } from '../../core/product-group';
+import { Period } from '../../period/period';
 import { Recipe } from '../recipe';
 import { RecipeListDatasource } from './recipe-list-datasource';