🐛(docs) run migration 0027 without superuser role

The migration 00227 must be run with a postgres superuser, most af
managed postgresql database can not be run using this kind of user.
Ti fix this, we use postgresql unnacent function instead of accessing C
function.

Author: lunika

CHANGELOG.md

@@ -10,6 +10,10 @@ and this project adheres to
 
 - ✨(backend) support creating subdoc from file #1987
 
+### Fixed
+
+- 🐛(docs) run migration 0027 without superuser role
+
 
 ## [v5.1.0] - 2026-05-11
 

src/backend/core/migrations/0027_auto_20251120_0956.py

@@ -11,15 +11,10 @@ class Migration(migrations.Migration):
     operations = [
         migrations.RunSQL(
             sql="""
-                CREATE OR REPLACE FUNCTION public.immutable_unaccent(regdictionary, text)
-                RETURNS text
-                LANGUAGE c IMMUTABLE PARALLEL SAFE STRICT AS
-                '$libdir/unaccent', 'unaccent_dict';
-
                 CREATE OR REPLACE FUNCTION public.f_unaccent(text)
                 RETURNS text
-                LANGUAGE sql IMMUTABLE PARALLEL SAFE STRICT
-                RETURN public.immutable_unaccent(regdictionary 'public.unaccent', $1);
+                LANGUAGE sql IMMUTABLE PARALLEL SAFE strict
+                return unaccent($1);
 
                 CREATE INDEX IF NOT EXISTS user_email_unaccent_trgm_idx
                 ON impress_user