adf-codec/corpus/round-trip/opaque-carry/unknown-inline.md

Draft: :adf{json="{"attrs":{"text":"Add a summary"},"type":"placeholder"}"} — expected Friday.

Blocked on :adf{json="{"attrs":{"extensionKey":"jira-issue","extensionType":"com.atlassian.jira.macro"},"marks":[{"type":"strong"}],"type":"inlineExtension"}"} until the rebuild lands.