Fixes T9078, Adds SubscribableInterface to Passphrase.
- Maniphest Tasks
- T9078: Allow Passphrase credentials to be subscribbable
- Restricted Diffusion Commit
rPb34dc6164af2: Add Subscribers to Passphrase
Create a new passphrase, see myself subscribed. Subscribe to other Passphrases.
Maybe omit this (just return false;) because we don't give the author any other special privileges for these object types.
In particular, if you're in charge of Twitter and move to the Devops team, it's reasonable to revoke your access to a Twitter credential even if you created it. It seems correct to sever the author from the credential completely at this point.