Notion page properties in document metadata and append fixes#

Notion connections expose page properties like status, tags, dates, and assignees as document metadata for filtering and queries, and appending to a document now retains the full combined content with its total token count.

Improvements

Notion connections now expose page properties such as status, tags, dates, and assignees as document metadata for filtering and queries.

Fixes

Appending to an existing document now retains the full combined content and reports its total token count.