gpg 2.x deprecated `--secret-keyring`

gpg 2.something (which is gpg1 version 2.x, different from gpg2?) deprecated --secret-keyring:

This is an obsolete option and ignored. All secret keys are stored in the `private-keys-v1.d' directory below the GnuPG home directory.

gpg now expects a single file per key in a structure like: https://git.autistici.org/ai/pgp-mime-lib/tree/076341436235c989f74b8120becc52e55eb7da9a/pgp_mime_lib/test/fixtures/gnupghome

Apps affected:

• ai-services
• helpdesk (currently not using it?)