Pre-registration (003-v1)

The locked, publicly-timestamped analysis plan for the upload-frequency study, tagged before any frequency-vs-views number was queried. This is the audit trail: the design spec and pre-registration as of this tag are what the sealed-holdout headline was read against.

See design-spec.md and preregistration.md at this tag. The published results live in the 003-v1-published release.