Agent Plugins 0.14.6

The fixes for the trial findings shipped in aep 0.59.3 and ess 0.32.0; the skills now describe that
behaviour instead of the workarounds. Each change was checked against the released binaries.

ess

• ess:retrofitting: ess infra import openapi reads OpenAPI 3.0 as well as 3.1. A nullable field
  imports as a coverage gap, carried into the draft as an UNMAPPED: marker; an object schema must
  be closed with additionalProperties: false, and that refusal is reported, not worked around.
• Syntax reference: two fields are compared through one struct (window.ends_at > window.starts_at); a right-hand side without a dot is a literal, so the flat form is refused. The
  stored-value case links ESS's design note for guards over stored fields.
• ess:specifying: the note that the CLI help calls the system.yaml layout "legacy" is gone; the
  help no longer says so.

aep

• aep:planning: the store's refusal of an empty findings fence now says to write []; the skill
  points at it instead of quoting the old message.