Sécurisation, déploiement CI/CD Gitea et documentation INFCDAAL3

- CI/CD Gitea Actions: ci.yml (Pint + PHPUnit), deploy.yml (déploiement SSH)
- Suppression de l'ancien workflow GitHub cassé
- En-têtes de sécurité: ajout CSP et Permissions-Policy
- RGPD: droit à l'effacement (anonymisation du compte) + tests
- Correctifs: ForceHttps hors env testing, timestamps du modèle Utilisateur,
  suppression des migrations en doublon (migrate échouait sur base neuve)
- Qualité: formatage Laravel Pint sur l'ensemble du code
- Documentation dossier technique (docs/) + .docx + .pptx

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

routes/web.php

@@ -1,16 +1,19 @@
 <?php
 
-use Illuminate\Support\Facades\Route;
 use App\Http\Controllers\LoginController;
 use App\Http\Controllers\ProfileController;
+use Illuminate\Http\Request;
+use Illuminate\Support\Facades\Route;
 
 Route::get('/', function () {
     return view('welcome');
 })->name('home');
 
-Route::get('/form-csrf', function () {return view('form-csrf');});
+Route::get('/form-csrf', function () {
+    return view('form-csrf');
+});
 
-Route::get('/debug-https', function (Illuminate\Http\Request $request) {
+Route::get('/debug-https', function (Request $request) {
     return response()->json([
         'isSecure' => $request->isSecure(),
         'url' => $request->url(),
@@ -44,4 +47,5 @@ Route::post('/logout', [LoginController::class, 'logout'])->name('logout');
 Route::middleware('auth')->group(function () {
     Route::get('/profile/settings', [ProfileController::class, 'settings'])->name('profile.settings');
     Route::put('/profile/update', [ProfileController::class, 'update'])->name('profile.update');
+    Route::delete('/profile', [ProfileController::class, 'destroy'])->name('profile.destroy');
 });