feat(reporting) : add transverse Reporting module (DBAL read-only, back)

LST-59 (3.1) backend. New native reporting module that aggregates across
TimeTracking/ProjectManagement/Absence with ZERO direct inter-module imports —
coupled only to the physical SQL schema via read-only DBAL (AuditLog provider
pattern).

- 4 read-only reports (ApiResource + DBAL provider + readonly DTO,
  paginationEnabled false, security reporting.view): /api/reports/
  {time-per-project, time-per-user, tasks-by-status, absences-by-type}.
  All filters bound-param, dates validated YYYY-MM-DD (default = current month),
  int filters validated by regex (cs-fixer-stable).
- No Doctrine entity, no migration. ReportFilterTrait centralises validation.
  Absence status compared by literal 'approved' to avoid importing the enum.
- ReportingModule registered (id reporting, reporting.view/export perms);
  sidebar /reporting item gated by module + permission (ROLE_ADMIN section).

169 tests green (163 + 6), 4 routes exposed, cs-fixer clean.

src/Module/Reporting/Infrastructure/ApiPlatform/Resource/TasksByStatusResource.php

@@ -0,0 +1,32 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Module\Reporting\Infrastructure\ApiPlatform\Resource;
+
+use ApiPlatform\Metadata\ApiResource;
+use ApiPlatform\Metadata\GetCollection;
+use App\Module\Reporting\Application\DTO\TasksByStatusOutput;
+use App\Module\Reporting\Infrastructure\ApiPlatform\State\TasksByStatusProvider;
+
+/**
+ * Rapport en lecture seule : nombre de taches non archivees par statut.
+ *
+ * Filtre query-param : ?projectId=
+ *
+ * Aucune entite Doctrine sous-jacente : le provider lit via DBAL et retourne
+ * directement une liste de TasksByStatusOutput. Pagination desactivee.
+ */
+#[ApiResource(
+    shortName: 'ReportTasksByStatus',
+    operations: [
+        new GetCollection(
+            uriTemplate: '/reports/tasks-by-status',
+            paginationEnabled: false,
+            security: "is_granted('reporting.view')",
+            provider: TasksByStatusProvider::class,
+        ),
+    ],
+    output: TasksByStatusOutput::class,
+)]
+final class TasksByStatusResource {}