Live-restore of a server DB (MariaDB/Postgres) raced the engine's first-init:
it starts a throwaway temp server, runs setup, then restarts the real one. The
old ping-based readiness passed against the temp server and the load hit the
restart, failing once.
- _backupDbWaitReady now requires a real query to succeed on two consecutive
checks, so the restart breaks the streak and we only proceed once the real
server is stably up.
- The dump load is retried (idempotent — the dump drops+recreates each object)
to ride past a final init bounce.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
Signed-off-by: librelad <librelad@digitalangels.vip>
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