Update Catalog Prompt Slots Router and Access Layer Exemptions

- Added documentation to the `catalog_prompt_slots.py` file to clarify its role as a global admin catalog requiring authentication and admin role, without tenant context.
- Updated the `check_access_layer_hints.py` script to include `catalog_prompt_slots.py` in the list of exempt routers, ensuring proper access control for admin functionalities.

backend/routers/catalog_prompt_slots.py

@@ -1,5 +1,8 @@
 """
 API: Katalog-Prompt-Slots (Stammdaten × Slot-Typ).
+
+Globaler Admin-Katalog (wie catalogs.py) — require_auth + Admin-Rolle, kein TenantContext.
+Eingetragen in backend/scripts/check_access_layer_hints.py EXEMPT_ROUTERS.
 """
 from __future__ import annotations
 

backend/scripts/check_access_layer_hints.py

@@ -29,6 +29,7 @@ EXEMPT_ROUTERS: frozenset[str] = frozenset(
         "admin_user_content.py",  # Superadmin Moderation nutzerangelegter Inhalte; require_auth + is_superadmin — kein Vereinsmandant
         "admin_rights.py",  # Superadmin Rollen/Rechte (Capabilities, Kontingent-Bypass, Pläne); require_auth + is_superadmin — kein Vereinsmandant
         "catalogs.py",
+        "catalog_prompt_slots.py",  # Admin Stammdaten KI-Prompt-Slots; require_auth + admin/superadmin — globaler Katalog, kein Vereinsmandant
         "skills.py",
         "maturity_models.py",
         "matrix_stack_bundle.py",