[horde] horde6: init empty sqlite errors

[A.Schulze]

Hello,

I build horde6 in a reproducible way: https://codeberg.org/andreasschulze/horde6-docker

when starting from scratch without mariadb, it uses sqlite and that version produces:

2026-04-03T15:44:21+00:00 DEBUG: HORDE 1. Horde_Core_Db_Migration->getMigrator() /horde6/vendor/horde/horde/bin/horde-db-migrate:172
2. Horde_Db_Migration_Migrator->__construct() /horde6/vendor/horde/core/lib/Horde/Core/Db/Migration.php:145
3. Horde_Support_Inflector->__construct() /horde6/vendor/horde/db/lib/Horde/Db/Migration/Migrator.php:81
4. Horde_ErrorHandler::errorHandler() /horde6/vendor/horde/support/lib/Horde/Support/Inflector.php:128
  
2026-04-03T15:44:21+00:00 ERR: HORDE [horde] SQL QUERY FAILED: SQLSTATE[HY000]: General error: 1 no such table: horde_vfs_seq
         DROP TABLE "horde_vfs_seq" [pid 80 on line 244 of "/horde6/vendor/horde/db/lib/Horde/Db/Adapter/Pdo/Base.php"]
2026-04-03T15:44:21+00:00 ERR: HORDE [horde] SQL QUERY FAILED: SQLSTATE[HY000]: General error: 1 no such table: horde_muvfs_seq
         DROP TABLE "horde_muvfs_seq" [pid 80 on line 244 of "/horde6/vendor/horde/db/lib/Horde/Db/Adapter/Pdo/Base.php"]
2026-04-03T15:44:21+00:00 DEBUG: HORDE [horde] Max memory usage: 6291456 bytes [pid 80 on line 648 of "/horde6/vendor/horde/core/lib/Horde/Registry.php"]

Starting from scratch (deleted volumes) with mariadb enabled in docker-compose.yml, no errors happen.
Although I prefer sqlite, I'll switch to mariadb for now.

Andreas