Heddle v0.13.0

Removed

• heddle.contrib.events is removed. Breaking for anyone importing
  it. The module was experimental and frozen, its delivery guarantees were
  never verified, and its bodies were never part of the exported wire
  contract. A new event log will follow under the same import path in a
  later release. There is no migration path from the old module to the new
  one. If you depend on the old module, pin heddle-ai to 0.12.x. Removed
  with it: the events.Event, events.Command and events.Rejection
  payload-type registrations in heddle.bootstrap, so those types now get
  the usual unknown-type handling; the CONCEPTS.md sections on the module;
  and the nats-acl-configuration runbook. ADR-013 is kept as a record,
  marked obsolete. The events extra stays, empty, so
  heddle-ai[events] still installs.

Fixed

• DoclingBackend works with backend_config: {}. The default
  ocr_engine was ocrmac on macOS and easyocr elsewhere, but neither is
  installed by the docproc extra, so converting a PDF failed with
  ocrmac is not correctly installed. The default is now auto: Docling
  picks the first installed engine (OcrMac if present, otherwise RapidOCR,
  which the extra installs). rapidocr is a new explicit choice. An unknown
  ocr_engine value now fails the conversion with a message listing the valid
  names, instead of silently using Docling's default (heddle#58).
• DoclingBackend reports has_tables and sections. They were
  always false and []: the code read iterate_items() results as bare
  items, but Docling yields (item, level) pairs (heddle#58).
• DoclingBackend reports page_count: 1 for DOCX, instead of 0.
  Docling does not paginate DOCX, HTML or Markdown; 1 matches the
  MarkItDown backend's floor (heddle#58).