feat(fp): WP-19 — Playwright e2e smoke against the real FE+backend

Adds a happy-path spec (login → dashboard → registratie wizard, including
a real identity-document upload → real submit) and a degraded-path spec
(?scenario=error → <app-async> error slot → retry), both driving the real
app against the real .NET backend, plus a CI job that boots both.

Writing the retry spec surfaced a real bug: AsyncComponent's retry() only
reloads a [resource]-fed instance, so every real page (all [data]-fed via
a store's RemoteData) had a silently no-op retry button. Added a
retryClicked output and wired it on the dashboard's two async blocks.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

src/app/registratie/ui/dashboard.page.ts

@@ -86,7 +86,7 @@ import { tasksFromProfile } from '@registratie/domain/tasks';
           >
         }
 
-        <app-async [data]="store.profile()">
+        <app-async [data]="store.profile()" (retryClicked)="store.reloadProfile()">
           <ng-template appAsyncLoaded>
             @if (profile(); as p) {
               @let tasks = tasksFor(p.registration);
@@ -153,7 +153,7 @@ import { tasksFromProfile } from '@registratie/domain/tasks';
             >Specialismen en aantekeningen</app-heading
           >
           <div class="app-section">
-            <app-async [data]="store.aantekeningen()">
+            <app-async [data]="store.aantekeningen()" (retryClicked)="store.reloadAantekeningen()">
               <ng-template appAsyncLoaded>
                 @if (aantekeningen(); as r) {
                   <app-registration-table [rows]="r" />