David decided: Turned off auto-prewarming so candidates only generate on explicit user clicks

David commissioned a study of the auto-prewarming system before making a kill-switch decision:

go study how the auto promotion of candidates into beign generated into actual lecture notes workspaces by the prewarming canvas dm distribution system works. i want to turn off that auto prewarming, for now, we'll enable it later again. but for now, only path to generating lecture notes workspaces should be users actually clicking on candidates. dont make code changes yet.

He then dispatched six subagents to audit the distribution orchestration layer before implementing the kill switch. This was a deliberate throttle to conserve backend resources and keep the generation pipeline demand-driven.