The DNS provider API endpoints were returning 404 in CI because the
encryption service failed to initialize with an invalid key.
Changed CHARON_ENCRYPTION_KEY from plain text to valid base64 string
Key "dGVzdC1lbmNyeXB0aW9uLWtleS1mb3ItY2ktMzJieXQ=" decodes to 32 bytes
Without valid encryption key, DNS provider routes don't register
This was causing all dns-provider-types.spec.ts tests to fail
Root cause: AES-256-GCM requires exactly 32 bytes for the key
19a34201bf