Three columns gate the opt-in GLP-1 PK research-view chart behind an
undismissable MDR-disclaimer dialog (research §2.3, §11):
research_mode_enabled — master switch, default false.
research_mode_acknowledged_at — timestamp of the latest ack.
research_mode_acknowledged_version — copy version the user read.
Versioning the acknowledgment lets the Settings UI re-prompt when
the disclaimer copy drifts ahead of the persisted value, so a copy
update cannot quietly keep the chart visible to a user who has not
read the new wording.
Migration 0058 uses ADD COLUMN IF NOT EXISTS to mirror 0057's
idempotent posture.
Marc-André Bombeck
5eeedd7202