Don't fail miserably when there's no LINEAR_API_KEY available. Be nice.

[bougyman]

This isn't a good look:

What the heck is this? ** (Ash.Error.Unknown)
Bread Crumbs:

Error returned from: LinearCli.Linear.Issue.list

Unknown Error

• unknown error: :missing_api_key
  (ash 3.31.2) lib/ash/actions/read/read.ex:1625: Ash.Actions.Read.maybe_in_transaction/3
  ** WTH? Cannot Continue **