Docs: Tweak lifecycle diagram (add padding, remove open parenthesis)

Source on diagrams.net:
https://drive.google.com/file/d/1PJ2nDZkiOreCHzH_PyQRImiH7Z0eoR8F/view?usp=sharing

Export:
* Export as SVG
* Zoom: 100%
* Border: 10
* Everythign off (Transparent, Shadow, Include diagram, Embed Fonts)

Post-processing for diagrams.net bugs:
* Remove any remnant `@import` for unused Google Font references.
* `"Arial"`     -> system-ui,sans-serif
* `"monospace"` -> monospace

Ref #1806.

Co-authored-by: FND <[email protected]>

Author: Krinkle