fix: Event-bus workflow trigger, RBAC on all routes, search provider, events, cron jobs

Critical fixes:
- Event Bus → Workflow auto-trigger: wildcard subscription starts workflows on matching events
- Kommunikation routes: require_permission on all 30+ endpoints (comm:read/write/delete/manage)
- Permissions routes: require_permission('permissions:admin') on all management endpoints
- CompanySearchProvider registered in auto_register_providers()

Medium fixes:
- system_notif events: 10 event_bus.publish() calls added (lead.created, contact.created/updated,
  task.created/overdue, mail.received, user.created, workflow.completed, notification.created, backup.*)
- Cron jobs: backup_check (daily), search_index_check (daily), workflow_timeout (5min) registered
- AI tool permission: call_crm_api now requires 'ai:write' permission
- New file: automation/jobs.py with backup_check and search_index_check functions

app/plugins/builtins/unified_search/provider_registry.py

@@ -112,6 +112,9 @@ async def auto_register_providers(db: AsyncSession) -> None:
     from app.plugins.builtins.unified_search.providers.event_provider import (
         EventSearchProvider,
     )
+    from app.plugins.builtins.unified_search.providers.company_provider import (
+        CompanySearchProvider,
+    )
 
     registry = get_search_registry()
     registry.clear()
@@ -122,6 +125,7 @@ async def auto_register_providers(db: AsyncSession) -> None:
         MailSearchProvider,
         FileSearchProvider,
         EventSearchProvider,
+        CompanySearchProvider,
     ]:
         try:
             registry.register(provider_cls())