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.
Replaces all occurrences of the 'init_error_traps' function with 'catch_errors' across container and install scripts for consistency in error handling. Also adjusts indentation and formatting in some scripts for improved readability.
