GoLand and Typora fail to draw the Mermaid sequence diagrams even though
the same text renders on the Mermaid versions they bundle. Embed SVGs
rendered with Mermaid 11.16.1 (white background) and keep the Mermaid
source in a collapsed section under each image.
Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
