feat: enhance Ansible playbook with project directory permissions and service checks

- Add tasks to set directory permissions for the project before and after cloning.
- Introduce a task to reload the SSH service to apply new configurations.
- Implement a check for Node Exporter metrics availability.
- Update Prometheus configuration comment for clarity on Node Exporter target.

infra/prometheus/prometheus.yml

@@ -13,7 +13,7 @@ scrape_configs:
   # Job для мониторинга Node Exporter
   - job_name: 'node'
     static_configs:
-      - targets: ['172.20.0.1:9100']  # IP хоста в Docker сети bots_network
+      - targets: ['172.20.0.1:9100']  # Node Exporter на хосте через Docker gateway
         labels:
           instance: 'main-server'