Verify Supabase Postgres Security

[CollectiveUnicorn]

Describe what should be investigated or refactored

Check and determine if the current Supabase Postgres security configs are adequate. If not, create additional issues for the necessary changes.

Additional context

• https://supabase.com/docs/guides/platform/going-into-prod
• https://supabase.com/docs/guides/database/secure-data
• https://supabase.com/docs/guides/platform/network-restrictions
• https://supabase.com/docs/guides/platform/ssl-enforcement

[CollectiveUnicorn]

Blocked by #380