Release v4.63.2

Changed

• Stage now gives each reason it refuses a reaction its own code, in the renderer, the Host and the semantic executor. Reactions are still not rendered or run (part of #207).
  • STAGE-ESM-024 names the trigger kind: clock (interval or schedule), application trigger, startup, shutdown, or an opaque reaction body.
  • The new STAGE-ESM-037 marks a trigger that both produces an event and invokes a command.
  • STAGE-ESM-013 names the $context.causedBy.* member a reaction uses.
  • Event-triggered reactions report STAGE-ESM-024, saying that reaction rendering is not yet admitted.