docs: update database schema documentation in second brain and grand functions

.agents/skills/grand-functions/references/schema.md

@@ -83,3 +83,15 @@ Das Datenbankschema besteht aus folgenden Tabellen im Schema `public`:
 - `pdf_url` (TEXT)
 - `status` (TEXT: `'pending'`, `'active'`, `'completed'`, `'cancelled'`)
 - `created_at` (TIMESTAMPTZ)
+
+### `settings` (Systemeinstellungen)
+- Globale Shopeinstellungen (SMTP und LicServer).
+- `id` (TEXT, Primary Key, z.B. `'licserver'`, `'smtp'`)
+- `host` (TEXT)
+- `port` (INTEGER)
+- `secure` (BOOLEAN)
+- `user` (TEXT)
+- `pass` (TEXT)
+- `licserver_base_url` (TEXT)
+- `licserver_api_key` (TEXT)
+- `updated_at` (TIMESTAMPTZ)