fix: enforce C collation for page position ordering to ensure consistent behavior in Postgres 17+ (#1446)

- Add explicit C collation to position ordering queries to fix incorrect page placement in PostgreSQL 17+
- Ensures consistent ASCII-based ordering regardless of database locale settings
- Fixes issue where new pages were incorrectly placed at random positions instead of bottom

apps/server/src/integrations/import/services/import.service.ts

@@ -178,7 +178,7 @@ export class ImportService {
       .selectFrom('pages')
       .select(['id', 'position'])
       .where('spaceId', '=', spaceId)
-      .orderBy('position', 'desc')
+      .orderBy('position', (ob) => ob.collate('C').desc())
       .limit(1)
       .where('parentPageId', 'is', null)
       .executeTakeFirst();