docs: fix DB migration, add sqlite migration helper script

scripts/sqlite_dump_commands.sh

@@ -0,0 +1,9 @@
+#! /bin/bash
+
+tables=("users" "groups" "memberships" "jwt_refresh_storage" "jwt_storage" "password_reset_tokens")
+echo ".header on"
+
+for table in ${tables[@]}; do
+    echo ".mode insert $table"
+    echo "select * from $table;"
+done