refactor: database repository (#16593)

* refactor: database repository

* fix error reindex check

* chore: remove WIP code

---------

Co-authored-by: mertalev <101130780+mertalev@users.noreply.github.com>

server/src/queries/database.repository.sql

@@ -0,0 +1,21 @@
+-- NOTE: This file is auto generated by ./sql-generator
+
+-- DatabaseRepository.getExtensionVersion
+SELECT
+  default_version as "availableVersion",
+  installed_version as "installedVersion"
+FROM
+  pg_available_extensions
+WHERE
+  name = $1
+
+-- DatabaseRepository.getPostgresVersion
+SHOW server_version
+
+-- DatabaseRepository.shouldReindex
+SELECT
+  idx_status
+FROM
+  pg_vector_index_stat
+WHERE
+  indexname = $1