chore: Add optional sentry error reporting

Exceptions are reported to sentry if the environment variable ERROR_REPORTING is set to True. If it is set to false or not set, no data is sent to sentry.

requirements.txt

 Django==5.1.3
 whitenoise==6.7.0
-gunicorn==22.0.0
+gunicorn==23.0.0
 sentry-sdk[django]==2.18.0