AbstractFramework 0.11.12

Pins AbstractGateway 0.15.9 across the light, Apple and GPU profiles. Other package pins are
unchanged from 0.11.11.

• Notification emails are written for the person who receives them: one AbstractFramework layout for
  every notice, a subject that names the workflow or entity (never a node id), the context (who
  started it and when), what is asked (each tool call with its label and its whole arguments, or the
  question and its choices), an Open in the console button to the exact run and an Open in
  AbstractCode button when the run has a session, a plain-text twin, and one email per wait instead
  of one per retry. Answering from the email itself is backlog 1028.
• Who is affected: everyone with email notifications on; abstractgateway update shows this and runs it.