Bump PostgreSQL target from 16 to 17 in discourse-install.sh and make pg_hba.conf lookup dynamic (uses find) instead of a hardcoded path, ensuring compatibility with systems where the data directory path differs. Also add EMAIL_SERVERS_WITH_PRIORITY and POSTFIX_SERVER entries to the SimpleLogin .env to configure local mail delivery (set to localhost).
Set NOT_SECURED=true in postiz install script for local/non-secured setups. In simplelogin install, detect the venv site-packages path and create a minimal newrelic package stub (newrelic/__init__.py and newrelic/agent.py) with no-op record_custom_event and initialize functions to avoid import errors when New Relic is not present.
