Root cause: Ghost's fresh-DB first boot runs a ~6-9min schema migration (round-trip-bound, not CPU);
the recipe healthcheck start_period:1m (~6min grace) kills the still-migrating task, leaving a stale
migrations_lock → every later task deadlocks (MigrationsAreLockedError). Hit on both 2- and 4-vCPU.
Fix (cc-ci deploy overlay, NOT a recipe/test change): compose.ccci-health.yml raises app healthcheck
start_period to 900s, wired via recipe_meta COMPOSE_FILE + install_steps.sh (+ CHAOS_BASE_DEPLOY for
the untracked overlay). No assertion weakened. Budget 1200s = migration + convergence. Only the
install tier needs it (upgrade redeploys on the populated DB → fast boot).
autonomic-bot
13da216f8d