This reverts commit a148802cb6.
Rollback after fencing adopted whatever activation was projected under the
shared Expected key, so a continuity abort's leftover activation could be
demoted by a later deploy. The drift is closed at its source by the next
commit: a continuity abort demotes its own exact activation. Rollback demotes
the admitted generation's exact activation again.
The doc paragraph is dropped; the 9f00e7a paragraph above it stays until B4.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
87fa57dd8c