[Fix] Zabbix: Add version-specific SQL script path for 7.0 LTS

Fixes installation failure for Zabbix 7.0 LTS caused by incorrect SQL script path.

Issue: Zabbix 7.0 LTS uses a different directory structure than 7.4 and 8.0:
- Zabbix 7.0 LTS: /usr/share/zabbix-sql-scripts/postgresql/server.sql.gz
- Zabbix 7.4+:    /usr/share/zabbix/sql-scripts/postgresql/server.sql.gz

The installer was hardcoded to use the newer path, causing 7.0 installations
to fail with: 'gzip: /usr/share/zabbix/sql-scripts/postgresql/server.sql.gz:
No such file or directory'

Solution:
Added version detection to use the correct SQL script path based on selected
Zabbix version. This ensures all supported versions (7.0 LTS, 7.4, 8.0) can
initialize their PostgreSQL database correctly.

Tested versions:
- 7.0 LTS: Now uses correct path and installs successfully
- 7.4: Continues to work with existing path
- 8.0: Continues to work with existing path

Fixes issue reported by @zjjiao in discussion with @MickLesk

install/zabbix-install.sh

@@ -44,7 +44,14 @@ curl -fsSL "$ZABBIX_DEB_URL" -o /tmp/"$ZABBIX_DEB_FILE"
 $STD dpkg -i /tmp/"$ZABBIX_DEB_FILE"
 $STD apt update
 $STD apt install -y zabbix-server-pgsql zabbix-frontend-php php8.4-pgsql zabbix-apache-conf zabbix-sql-scripts
-zcat /usr/share/zabbix/sql-scripts/postgresql/server.sql.gz | sudo -u "$PG_DB_USER" psql "$PG_DB_NAME" &>/dev/null
+
+if [[ "$ZABBIX_VERSION" == "7.0" ]]; then
+  ZABBIX_SQL="/usr/share/zabbix-sql-scripts/postgresql/server.sql.gz"
+else
+  ZABBIX_SQL="/usr/share/zabbix/sql-scripts/postgresql/server.sql.gz"
+fi
+
+zcat "$ZABBIX_SQL" | sudo -u "$PG_DB_USER" psql "$PG_DB_NAME" &>/dev/null
 sed -i "s/^DBName=.*/DBName=$PG_DB_NAME/" /etc/zabbix/zabbix_server.conf
 sed -i "s/^DBUser=.*/DBUser=$PG_DB_USER/" /etc/zabbix/zabbix_server.conf
 sed -i "s/^# DBPassword=.*/DBPassword=$PG_DB_PASS/" /etc/zabbix/zabbix_server.conf