The lexicon source updated content from plain string to { $type, value } richtext object and renamed topic createdAt to publishedAt, but the firehose indexers and tests still used the old format. Docker builds from source, causing type errors that blocked staging deploys. - Extract content.value for sanitizeHtml calls in topic/reply indexers - Use 'markdown' literal for contentFormat (derived from $type) - Use record.publishedAt for topic timestamps - Update all unit and integration test fixtures to match new schema