Update database schema and queries: Bookmann → Bookhoard

Database changes:
- schema.sql: Update column name bookmann_uuid → bookhoard_uuid
- schema.sql: Update index names and example URLs
- queries.sql: Update all SQL queries to use bookhoard_uuid
- Update example configuration values

Part of project rename to Bookhoard.

internal/database/queries/queries.sql

@@ -1379,7 +1379,7 @@ DELETE FROM device_shelf_mappings WHERE id = $1;
 
 -- Create device catalog entry
 -- name: CreateDeviceCatalog :one
-INSERT INTO device_catalogs (device_id, media_item_id, bookmann_uuid, kobo_content_id, content_id_type, available, delivery_date, delivery_method)
+INSERT INTO device_catalogs (device_id, media_item_id, bookhoard_uuid, kobo_content_id, content_id_type, available, delivery_date, delivery_method)
 VALUES ($1, $2, $3, $4, $5, $6, $7, $8)
 ON CONFLICT (device_id, kobo_content_id)
 DO UPDATE SET
@@ -1390,7 +1390,7 @@ RETURNING *;
 
 -- Get device catalog by Bookhoard UUID
 -- name: GetDeviceCatalogByBookhoardUUID :one
-SELECT * FROM device_catalogs WHERE device_id = $1 AND bookmann_uuid = $2;
+SELECT * FROM device_catalogs WHERE device_id = $1 AND bookhoard_uuid = $2;
 
 -- Get device catalog by Kobo ContentId
 -- name: GetDeviceCatalogByKoboContentId :one