Add end time/duration to octopus_energy_octoplus_join_saving_session.yml

[reedy]

Describe the feature

The blueprint for auto signup and notifications for joining a saving session are great, but the last few have been 30 minutes (rather than the more usual 60 minutes etc), so it would be useful if the end time (and/or duration) of the saving session was included in the notification.

Expected behaviour

Rather than the current Joined a new Octopus Energy saving session. It starts at 18:00 on 2/3, it displays something like Joined a new Octopus Energy saving session. It starts at 18:00 on 2/3, and ends at 18:30 on 2/3. or Joined a new Octopus Energy saving session. It starts at 18:00 on 2/3 and lasts 30 minutes. or even Joined a new Octopus Energy saving session. It starts at 18:00 on 2/3, lasts 30 minutes, and ends at 18:30 on 2/3.

Use Case

I'm lazy and I don't want to have to open the Octopus App to see its duration. Or in some cases, even HA, as notifications could be pushed to other devices etc.

Confirmation

• [X] By submitting this feature request, you agree that you have read the documentation and confirmed it does not already exist
• [X] I am willing/able to help contribute to the solution of this feature

[BottlecapDave]

The blueprint has now been updated to include the duration in minutes. There is also a new variation of the blueprint which allows the user to change how the message is sent.