Bump Baikal to deb13 (#9544)

Bump default OS version to Debian 13 and PHP to 8.3 in Baikal install scripts and config. Add curl to PHP modules. Refactor PostgreSQL database setup to use new variable names and helper function for credentials.

ct/baikal.sh

@@ -11,7 +11,7 @@ var_cpu="${var_cpu:-1}"
 var_ram="${var_ram:-512}"
 var_disk="${var_disk:-4}"
 var_os="${var_os:-debian}"
-var_version="${var_version:-12}"
+var_version="${var_version:-13}"
 var_unprivileged="${var_unprivileged:-1}"
 
 header_info "$APP"
@@ -37,8 +37,9 @@ function update_script() {
     mv /opt/baikal /opt/baikal-backup
     msg_ok "Backed up data"
 
-    fetch_and_deploy_gh_release "baikal" "sabre-io/Baikal"
+    PHP_APACHE="YES" PHP_MODULE="pgsql,curl" PHP_VERSION="8.3" setup_php
     setup_composer
+    fetch_and_deploy_gh_release "baikal" "sabre-io/Baikal"
 
     msg_info "Configuring Baikal"
     cp -r /opt/baikal-backup/config/baikal.yaml /opt/baikal/config/