feat: add unaccent support for accent-insensitive search (#1402)

- Add PostgreSQL unaccent and pg_trgm extensions
- Create immutable f_unaccent wrapper function for performance
- Update all search queries to use f_unaccent for accent-insensitive matching
- Add 1MB limit to tsvector content to prevent errors on large documents
- Update full-text search trigger to use f_unaccent
- Fix MultiSelect client-side filtering to show server results properly

apps/server/src/database/repos/space/space.repo.ts

@@ -110,10 +110,10 @@ export class SpaceRepo {
 
     if (pagination.query) {
       query = query.where((eb) =>
-        eb('name', 'ilike', `%${pagination.query}%`).or(
-          'description',
+        eb(sql`f_unaccent(name)`, 'ilike', sql`f_unaccent(${'%' + pagination.query + '%'})`).or(
+          sql`f_unaccent(description)`,
           'ilike',
-          `%${pagination.query}%`,
+          sql`f_unaccent(${'%' + pagination.query + '%'})`,
         ),
       );
     }