Add Einrichtung and Fachbereich as permission/filter types (knowledgecenter + tasks)

- Create knowledgecenter_category_einricht, _fachbereich, knowledgecenter_post_einricht,
  knowledgecenter_post_fachbereich tables; extend task_target_rule with main_einricht_id
  and main_bereich_id columns
- Middleware: load main_einricht_id/main_bereich_id from main_contact_department,
  expose $allowedEinrichts/$allowedFachbereiche globals (same pattern as existing 3 types)
- Ajax: add update_category/post_einrichts/fachbereiche functions, extend
  update_category_links() and search filter query
- Views: add einricht/fachbereich LEFT JOINs and WHERE filters in all 5 query sites
  (categories_posts_listform, category_posts_widget, post_announcement_listform,
  post_cardform userHasAccessForPost, Ajax search)
- post_cardform_settings: add Einrichtungen/Fachbereiche tagify pickers with save/load
- Tasks: add listEinrichts/listFachbereiche to repo+service, add UI selects in task_form,
  extend target-rule normalization and upsert builder, extend AssignmentResolverService
  scope loading and matchesAnyRule to include einricht/fachbereich matching

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

module/tasks/service/TaskLookupService.php

@@ -19,6 +19,8 @@ class TaskLookupService
             'mandants' => $this->safeFetch('mandants', fn(): array => $this->lookupRepo->listMandants()),
             'departments' => $this->safeFetch('departments', fn(): array => $this->lookupRepo->listDepartments()),
             'roles' => $this->safeFetch('roles', fn(): array => $this->lookupRepo->listRoles()),
+            'einrichts' => $this->safeFetch('einrichts', fn(): array => $this->lookupRepo->listEinrichts()),
+            'fachbereiche' => $this->safeFetch('fachbereiche', fn(): array => $this->lookupRepo->listFachbereiche()),
             'contacts' => $this->safeFetch('contacts', fn(): array => $this->lookupRepo->listActiveContacts()),
             'knowledge_posts' => $this->safeFetch('knowledge_posts', fn(): array => $this->lookupRepo->listKnowledgePosts($languageId)),
         ];