v1.4.15 Phase B5 — first commit. Adds a boolean column
`users.onboarding_tour_completed` (default false) to track whether the
user has finished or explicitly dismissed the new spotlight tour that
overlays the dashboard on first arrival.
This is *distinct* from the existing `onboarding_completed_at` column
which gates the 3-step wizard at `/onboarding`. The new tour runs
*after* the wizard, on the dashboard, walking new users through the
tile strip, quick-add menu, insights page, integrations, and (when
B4 ships) achievements. Flipped to `true` on tour completion or
explicit dismiss; users can replay the tour from
Settings → Account → "Restart onboarding tour".
Migration `0030_onboarding_tour_completed` is additive-only (column
default `false`), so no backfill is needed and existing users will
see the tour on next dashboard load — acceptable because the tour is
a 4-6 step tooltip overlay with a Skip button on every step, not a
forced flow.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
