VIP MU plugins v20260901.0

View Pull Request: https://github.com/Automattic/vip-go-mu-plugins/pull/7224

Changed

• HyperDB: Updated to the latest upstream version.
• Real-Time Collaboration: Moved collaboration and its bundled HTTP polling provider behind one opt-in Gutenberg experiment, disabled by default, while allowing plugins to replace the default provider.
• Real-Time Collaboration: Enabled Gutenberg’s unified real-time collaboration experiment by default and moved its control from Gutenberg’s Experiments page to the VIP Real-Time Collaboration settings page.
• Updated the default version of wp-parsely to 3.24.

Added

• Real-Time Collaboration: Added session-scoped Anonymous User identities so authorized collaborators could continue editing when WordPress user profiles were unavailable.
• Real-Time Collaboration: Added an emergency fallback setting that disabled collaboration and the VIP WebSocket provider together.
• Real-Time Collaboration: Added an admin notice when the installed Gutenberg version was older than the required 23.8.0.

Fixed

• Real-Time Collaboration: Prevented misplaced collaborator cursors, selections, and highlights inside collapsed content, showed presence on the nearest visible container, and revealed collapsed Details content when navigating to a collaborator.