vhaudiquet
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A failed post returns retry(), which moves the next run onto WorkManager's exponential backoff — 30s doubling, capped at five hours. A couple of failures while the claw is unreachable is enough to leave the fleet without a report for most of a day, which reads exactly like the phone being gone. The snapshot is only saved when every post landed, so the next scheduled run re-derives the whole transition set and posts it again. The fifteen-minute schedule is the retry; return success and keep it.