feat(inventory): update PostgreSQL image version from 16-alpine to 17-alpine

- Updated `postgres_image` in `inventory/host_vars/localhost.yml` to use version 17-alpine
- Aligns with infrastructure standardization and ensures latest PostgreSQL features and security updates

Closes #XYZ

Author: janikvonrotz

inventory/host_vars/localhost.yml

@@ -21,7 +21,7 @@ iam_users:
     hosts: "{{ groups.all }}"
 
 # https://hub.docker.com/_/postgres
-postgres_image: postgres:16-alpine
+postgres_image: postgres:17-alpine
 # postgres_build_image: true # default: false
 postgres_hostname: postgres01
 postgres_user: example