Archived V5 Production Activation Checklist

The previous V5 implementation has been removed from the application and is no longer available in development or production. This file remains only to record that the old activation plan was abandoned.

• Migration prototypes are archived under docs/v5/migrations/.
• UI prototypes are archived under docs/v5/ui/.
• All remaining backend, configuration, development tooling, and test sources are archived under docs/v5/archive/ using their original paths.
• Archived files are non-executable and must not be registered, imported, built, or served.
• A future V5 implementation must define a new architecture, database strategy, rollout plan, and production checklist.