Update user modification time when changing password

Added modified_date update to OPAQUE password registration to ensure both password_modified_date and user modified_date are updated when passwords change. This provides better compatibility with LDAP clients that rely on modifyTimestamp for cache invalidation.

Co-authored-by: nitnelave <796633+nitnelave@users.noreply.github.com>

crates/sql-backend-handler/src/sql_opaque_handler.rs

@@ -202,6 +202,7 @@ impl OpaqueHandler for SqlOpaqueHandler {
             user_id: ActiveValue::Set(username.clone()),
             password_hash: ActiveValue::Set(Some(password_file.serialize())),
             password_modified_date: ActiveValue::Set(now),
+            modified_date: ActiveValue::Set(now),
             ..Default::default()
         };
         user_update.update(&self.sql_pool).await?;