publicKeyWarning function
Implementation
String publicKeyWarning() => '''
Warning: this looks like a publishable/anon key.
Hosted Supabase projects no longer return the database schema for these keys,
so generation will likely fail with a 401/403. Use a secret key (sb_secret_...)
or the legacy service_role key instead. Local Supabase stacks still accept it.
Keep the secret key out of your app and out of git, e.g. in a gitignored .env.
See: $openApiChangelogUrl''';